Vortex Rope Formation in a High Head Model Francis Turbine
Francis turbine working at off-design operating condition experiences high swirling flow at the runner outlet. In the present study, a high head model Francis turbine was experimentally investigated during load rejection, i.e., best efficiency point (BEP) to part load (PL), to detect the physical me...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Goyal, Rahul [verfasserIn] |
|---|
| Format: |
Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
2017 |
|---|
| Übergeordnetes Werk: |
Enthalten in: Journal of fluids engineering - New York, NY : ASME, 1973, 139(2017), 4 |
|---|---|
| Übergeordnetes Werk: |
volume:139 ; year:2017 ; number:4 |
| Links: |
|---|
| DOI / URN: |
10.1115/1.4035224 |
|---|
| Katalog-ID: |
OLC1984343904 |
|---|
| LEADER | 01000caa a2200265 4500 | ||
|---|---|---|---|
| 001 | OLC1984343904 | ||
| 003 | DE-627 | ||
| 005 | 20230714223633.0 | ||
| 007 | tu | ||
| 008 | 161202s2017 xx ||||| 00| ||eng c | ||
| 024 | 7 | |a 10.1115/1.4035224 |2 doi | |
| 028 | 5 | 2 | |a PQ20170301 |
| 035 | |a (DE-627)OLC1984343904 | ||
| 035 | |a (DE-599)GBVOLC1984343904 | ||
| 035 | |a (PRQ)a534-b299536b9cb49c9a82be5cca98aa9c9957ce51bea57126dfe536701de80fa880 | ||
| 035 | |a (KEY)0030937020170000139000400000vortexropeformationinahighheadmodelfrancisturbine | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 082 | 0 | 4 | |a 530 |a 620 |q DNB |
| 100 | 1 | |a Goyal, Rahul |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Vortex Rope Formation in a High Head Model Francis Turbine |
| 264 | 1 | |c 2017 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ohne Hilfsmittel zu benutzen |b n |2 rdamedia | ||
| 338 | |a Band |b nc |2 rdacarrier | ||
| 520 | |a Francis turbine working at off-design operating condition experiences high swirling flow at the runner outlet. In the present study, a high head model Francis turbine was experimentally investigated during load rejection, i.e., best efficiency point (BEP) to part load (PL), to detect the physical mechanism that lies in the formation of vortex rope. For that, a complete measurement system of dynamic pressure, head, flow, guide vanes (GVs) angular position, and runner shaft torque was setup with corresponding sensors at selected locations of the turbine. The measurements were synchronized with the two-dimensional (2D) particle image velocimetry (PIV) measurements of the draft tube. The study comprised an efficiency measurement and maximum hydraulic efficiency of 92.4 ± 0.15% was observed at BEP condition of turbine. The severe pressure fluctuations corresponding to rotor–stator interaction (RSI), standing waves, and rotating vortex rope (RVR) have been observed in the draft tube and vaneless space of the turbine. Moreover, RVR in the draft tube has been decomposed into two different modes; rotating and plunging modes. The time of occurrence of both modes was investigated in pressure and velocity data and results showed that the plunging mode appears 0.8 s before the rotating mode. In the vaneless space, the plunging mode was captured before it appears in the draft tube. The physical mechanism behind the vortex rope formation was analyzed from the instantaneous PIV velocity vector field. The development of stagnation region at the draft tube center and high axial velocity gradients along the draft tube centerline could possibly cause the formation of vortex rope. | ||
| 700 | 1 | |a Cervantes, Michel J |4 oth | |
| 700 | 1 | |a Gandhi, B. K |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |t Journal of fluids engineering |d New York, NY : ASME, 1973 |g 139(2017), 4 |w (DE-627)129596396 |w (DE-600)240774-7 |w (DE-576)015089444 |x 0098-2202 |7 nnns |
| 773 | 1 | 8 | |g volume:139 |g year:2017 |g number:4 |
| 856 | 4 | 1 | |u http://dx.doi.org/10.1115/1.4035224 |3 Volltext |
| 856 | 4 | 2 | |u http://dx.doi.org/10.1115/1.4035224 |
| 912 | |a GBV_USEFLAG_A | ||
| 912 | |a SYSFLAG_A | ||
| 912 | |a GBV_OLC | ||
| 912 | |a SSG-OLC-TEC | ||
| 912 | |a SSG-OLC-PHY | ||
| 912 | |a GBV_ILN_70 | ||
| 912 | |a GBV_ILN_170 | ||
| 912 | |a GBV_ILN_201 | ||
| 912 | |a GBV_ILN_2016 | ||
| 912 | |a GBV_ILN_4266 | ||
| 912 | |a GBV_ILN_4314 | ||
| 951 | |a AR | ||
| 952 | |d 139 |j 2017 |e 4 | ||
| author_variant |
r g rg |
|---|---|
| matchkey_str |
article:00982202:2017----::otxoeomtoiaihedoef |
| hierarchy_sort_str |
2017 |
| publishDate |
2017 |
| allfields |
10.1115/1.4035224 doi PQ20170301 (DE-627)OLC1984343904 (DE-599)GBVOLC1984343904 (PRQ)a534-b299536b9cb49c9a82be5cca98aa9c9957ce51bea57126dfe536701de80fa880 (KEY)0030937020170000139000400000vortexropeformationinahighheadmodelfrancisturbine DE-627 ger DE-627 rakwb eng 530 620 DNB Goyal, Rahul verfasserin aut Vortex Rope Formation in a High Head Model Francis Turbine 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Francis turbine working at off-design operating condition experiences high swirling flow at the runner outlet. In the present study, a high head model Francis turbine was experimentally investigated during load rejection, i.e., best efficiency point (BEP) to part load (PL), to detect the physical mechanism that lies in the formation of vortex rope. For that, a complete measurement system of dynamic pressure, head, flow, guide vanes (GVs) angular position, and runner shaft torque was setup with corresponding sensors at selected locations of the turbine. The measurements were synchronized with the two-dimensional (2D) particle image velocimetry (PIV) measurements of the draft tube. The study comprised an efficiency measurement and maximum hydraulic efficiency of 92.4 ± 0.15% was observed at BEP condition of turbine. The severe pressure fluctuations corresponding to rotor–stator interaction (RSI), standing waves, and rotating vortex rope (RVR) have been observed in the draft tube and vaneless space of the turbine. Moreover, RVR in the draft tube has been decomposed into two different modes; rotating and plunging modes. The time of occurrence of both modes was investigated in pressure and velocity data and results showed that the plunging mode appears 0.8 s before the rotating mode. In the vaneless space, the plunging mode was captured before it appears in the draft tube. The physical mechanism behind the vortex rope formation was analyzed from the instantaneous PIV velocity vector field. The development of stagnation region at the draft tube center and high axial velocity gradients along the draft tube centerline could possibly cause the formation of vortex rope. Cervantes, Michel J oth Gandhi, B. K oth Enthalten in Journal of fluids engineering New York, NY : ASME, 1973 139(2017), 4 (DE-627)129596396 (DE-600)240774-7 (DE-576)015089444 0098-2202 nnns volume:139 year:2017 number:4 http://dx.doi.org/10.1115/1.4035224 Volltext http://dx.doi.org/10.1115/1.4035224 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_70 GBV_ILN_170 GBV_ILN_201 GBV_ILN_2016 GBV_ILN_4266 GBV_ILN_4314 AR 139 2017 4 |
| spelling |
10.1115/1.4035224 doi PQ20170301 (DE-627)OLC1984343904 (DE-599)GBVOLC1984343904 (PRQ)a534-b299536b9cb49c9a82be5cca98aa9c9957ce51bea57126dfe536701de80fa880 (KEY)0030937020170000139000400000vortexropeformationinahighheadmodelfrancisturbine DE-627 ger DE-627 rakwb eng 530 620 DNB Goyal, Rahul verfasserin aut Vortex Rope Formation in a High Head Model Francis Turbine 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Francis turbine working at off-design operating condition experiences high swirling flow at the runner outlet. In the present study, a high head model Francis turbine was experimentally investigated during load rejection, i.e., best efficiency point (BEP) to part load (PL), to detect the physical mechanism that lies in the formation of vortex rope. For that, a complete measurement system of dynamic pressure, head, flow, guide vanes (GVs) angular position, and runner shaft torque was setup with corresponding sensors at selected locations of the turbine. The measurements were synchronized with the two-dimensional (2D) particle image velocimetry (PIV) measurements of the draft tube. The study comprised an efficiency measurement and maximum hydraulic efficiency of 92.4 ± 0.15% was observed at BEP condition of turbine. The severe pressure fluctuations corresponding to rotor–stator interaction (RSI), standing waves, and rotating vortex rope (RVR) have been observed in the draft tube and vaneless space of the turbine. Moreover, RVR in the draft tube has been decomposed into two different modes; rotating and plunging modes. The time of occurrence of both modes was investigated in pressure and velocity data and results showed that the plunging mode appears 0.8 s before the rotating mode. In the vaneless space, the plunging mode was captured before it appears in the draft tube. The physical mechanism behind the vortex rope formation was analyzed from the instantaneous PIV velocity vector field. The development of stagnation region at the draft tube center and high axial velocity gradients along the draft tube centerline could possibly cause the formation of vortex rope. Cervantes, Michel J oth Gandhi, B. K oth Enthalten in Journal of fluids engineering New York, NY : ASME, 1973 139(2017), 4 (DE-627)129596396 (DE-600)240774-7 (DE-576)015089444 0098-2202 nnns volume:139 year:2017 number:4 http://dx.doi.org/10.1115/1.4035224 Volltext http://dx.doi.org/10.1115/1.4035224 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_70 GBV_ILN_170 GBV_ILN_201 GBV_ILN_2016 GBV_ILN_4266 GBV_ILN_4314 AR 139 2017 4 |
| allfields_unstemmed |
10.1115/1.4035224 doi PQ20170301 (DE-627)OLC1984343904 (DE-599)GBVOLC1984343904 (PRQ)a534-b299536b9cb49c9a82be5cca98aa9c9957ce51bea57126dfe536701de80fa880 (KEY)0030937020170000139000400000vortexropeformationinahighheadmodelfrancisturbine DE-627 ger DE-627 rakwb eng 530 620 DNB Goyal, Rahul verfasserin aut Vortex Rope Formation in a High Head Model Francis Turbine 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Francis turbine working at off-design operating condition experiences high swirling flow at the runner outlet. In the present study, a high head model Francis turbine was experimentally investigated during load rejection, i.e., best efficiency point (BEP) to part load (PL), to detect the physical mechanism that lies in the formation of vortex rope. For that, a complete measurement system of dynamic pressure, head, flow, guide vanes (GVs) angular position, and runner shaft torque was setup with corresponding sensors at selected locations of the turbine. The measurements were synchronized with the two-dimensional (2D) particle image velocimetry (PIV) measurements of the draft tube. The study comprised an efficiency measurement and maximum hydraulic efficiency of 92.4 ± 0.15% was observed at BEP condition of turbine. The severe pressure fluctuations corresponding to rotor–stator interaction (RSI), standing waves, and rotating vortex rope (RVR) have been observed in the draft tube and vaneless space of the turbine. Moreover, RVR in the draft tube has been decomposed into two different modes; rotating and plunging modes. The time of occurrence of both modes was investigated in pressure and velocity data and results showed that the plunging mode appears 0.8 s before the rotating mode. In the vaneless space, the plunging mode was captured before it appears in the draft tube. The physical mechanism behind the vortex rope formation was analyzed from the instantaneous PIV velocity vector field. The development of stagnation region at the draft tube center and high axial velocity gradients along the draft tube centerline could possibly cause the formation of vortex rope. Cervantes, Michel J oth Gandhi, B. K oth Enthalten in Journal of fluids engineering New York, NY : ASME, 1973 139(2017), 4 (DE-627)129596396 (DE-600)240774-7 (DE-576)015089444 0098-2202 nnns volume:139 year:2017 number:4 http://dx.doi.org/10.1115/1.4035224 Volltext http://dx.doi.org/10.1115/1.4035224 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_70 GBV_ILN_170 GBV_ILN_201 GBV_ILN_2016 GBV_ILN_4266 GBV_ILN_4314 AR 139 2017 4 |
| allfieldsGer |
10.1115/1.4035224 doi PQ20170301 (DE-627)OLC1984343904 (DE-599)GBVOLC1984343904 (PRQ)a534-b299536b9cb49c9a82be5cca98aa9c9957ce51bea57126dfe536701de80fa880 (KEY)0030937020170000139000400000vortexropeformationinahighheadmodelfrancisturbine DE-627 ger DE-627 rakwb eng 530 620 DNB Goyal, Rahul verfasserin aut Vortex Rope Formation in a High Head Model Francis Turbine 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Francis turbine working at off-design operating condition experiences high swirling flow at the runner outlet. In the present study, a high head model Francis turbine was experimentally investigated during load rejection, i.e., best efficiency point (BEP) to part load (PL), to detect the physical mechanism that lies in the formation of vortex rope. For that, a complete measurement system of dynamic pressure, head, flow, guide vanes (GVs) angular position, and runner shaft torque was setup with corresponding sensors at selected locations of the turbine. The measurements were synchronized with the two-dimensional (2D) particle image velocimetry (PIV) measurements of the draft tube. The study comprised an efficiency measurement and maximum hydraulic efficiency of 92.4 ± 0.15% was observed at BEP condition of turbine. The severe pressure fluctuations corresponding to rotor–stator interaction (RSI), standing waves, and rotating vortex rope (RVR) have been observed in the draft tube and vaneless space of the turbine. Moreover, RVR in the draft tube has been decomposed into two different modes; rotating and plunging modes. The time of occurrence of both modes was investigated in pressure and velocity data and results showed that the plunging mode appears 0.8 s before the rotating mode. In the vaneless space, the plunging mode was captured before it appears in the draft tube. The physical mechanism behind the vortex rope formation was analyzed from the instantaneous PIV velocity vector field. The development of stagnation region at the draft tube center and high axial velocity gradients along the draft tube centerline could possibly cause the formation of vortex rope. Cervantes, Michel J oth Gandhi, B. K oth Enthalten in Journal of fluids engineering New York, NY : ASME, 1973 139(2017), 4 (DE-627)129596396 (DE-600)240774-7 (DE-576)015089444 0098-2202 nnns volume:139 year:2017 number:4 http://dx.doi.org/10.1115/1.4035224 Volltext http://dx.doi.org/10.1115/1.4035224 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_70 GBV_ILN_170 GBV_ILN_201 GBV_ILN_2016 GBV_ILN_4266 GBV_ILN_4314 AR 139 2017 4 |
| allfieldsSound |
10.1115/1.4035224 doi PQ20170301 (DE-627)OLC1984343904 (DE-599)GBVOLC1984343904 (PRQ)a534-b299536b9cb49c9a82be5cca98aa9c9957ce51bea57126dfe536701de80fa880 (KEY)0030937020170000139000400000vortexropeformationinahighheadmodelfrancisturbine DE-627 ger DE-627 rakwb eng 530 620 DNB Goyal, Rahul verfasserin aut Vortex Rope Formation in a High Head Model Francis Turbine 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Francis turbine working at off-design operating condition experiences high swirling flow at the runner outlet. In the present study, a high head model Francis turbine was experimentally investigated during load rejection, i.e., best efficiency point (BEP) to part load (PL), to detect the physical mechanism that lies in the formation of vortex rope. For that, a complete measurement system of dynamic pressure, head, flow, guide vanes (GVs) angular position, and runner shaft torque was setup with corresponding sensors at selected locations of the turbine. The measurements were synchronized with the two-dimensional (2D) particle image velocimetry (PIV) measurements of the draft tube. The study comprised an efficiency measurement and maximum hydraulic efficiency of 92.4 ± 0.15% was observed at BEP condition of turbine. The severe pressure fluctuations corresponding to rotor–stator interaction (RSI), standing waves, and rotating vortex rope (RVR) have been observed in the draft tube and vaneless space of the turbine. Moreover, RVR in the draft tube has been decomposed into two different modes; rotating and plunging modes. The time of occurrence of both modes was investigated in pressure and velocity data and results showed that the plunging mode appears 0.8 s before the rotating mode. In the vaneless space, the plunging mode was captured before it appears in the draft tube. The physical mechanism behind the vortex rope formation was analyzed from the instantaneous PIV velocity vector field. The development of stagnation region at the draft tube center and high axial velocity gradients along the draft tube centerline could possibly cause the formation of vortex rope. Cervantes, Michel J oth Gandhi, B. K oth Enthalten in Journal of fluids engineering New York, NY : ASME, 1973 139(2017), 4 (DE-627)129596396 (DE-600)240774-7 (DE-576)015089444 0098-2202 nnns volume:139 year:2017 number:4 http://dx.doi.org/10.1115/1.4035224 Volltext http://dx.doi.org/10.1115/1.4035224 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_70 GBV_ILN_170 GBV_ILN_201 GBV_ILN_2016 GBV_ILN_4266 GBV_ILN_4314 AR 139 2017 4 |
| language |
English |
| source |
Enthalten in Journal of fluids engineering 139(2017), 4 volume:139 year:2017 number:4 |
| sourceStr |
Enthalten in Journal of fluids engineering 139(2017), 4 volume:139 year:2017 number:4 |
| format_phy_str_mv |
Article |
| institution |
findex.gbv.de |
| dewey-raw |
530 |
| isfreeaccess_bool |
false |
| container_title |
Journal of fluids engineering |
| authorswithroles_txt_mv |
Goyal, Rahul @@aut@@ Cervantes, Michel J @@oth@@ Gandhi, B. K @@oth@@ |
| publishDateDaySort_date |
2017-01-01T00:00:00Z |
| hierarchy_top_id |
129596396 |
| dewey-sort |
3530 |
| id |
OLC1984343904 |
| language_de |
englisch |
| fullrecord |
<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a2200265 4500</leader><controlfield tag="001">OLC1984343904</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230714223633.0</controlfield><controlfield tag="007">tu</controlfield><controlfield tag="008">161202s2017 xx ||||| 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1115/1.4035224</subfield><subfield code="2">doi</subfield></datafield><datafield tag="028" ind1="5" ind2="2"><subfield code="a">PQ20170301</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)OLC1984343904</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)GBVOLC1984343904</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(PRQ)a534-b299536b9cb49c9a82be5cca98aa9c9957ce51bea57126dfe536701de80fa880</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(KEY)0030937020170000139000400000vortexropeformationinahighheadmodelfrancisturbine</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">530</subfield><subfield code="a">620</subfield><subfield code="q">DNB</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Goyal, Rahul</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Vortex Rope Formation in a High Head Model Francis Turbine</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2017</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">ohne Hilfsmittel zu benutzen</subfield><subfield code="b">n</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Band</subfield><subfield code="b">nc</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Francis turbine working at off-design operating condition experiences high swirling flow at the runner outlet. In the present study, a high head model Francis turbine was experimentally investigated during load rejection, i.e., best efficiency point (BEP) to part load (PL), to detect the physical mechanism that lies in the formation of vortex rope. For that, a complete measurement system of dynamic pressure, head, flow, guide vanes (GVs) angular position, and runner shaft torque was setup with corresponding sensors at selected locations of the turbine. The measurements were synchronized with the two-dimensional (2D) particle image velocimetry (PIV) measurements of the draft tube. The study comprised an efficiency measurement and maximum hydraulic efficiency of 92.4 ± 0.15% was observed at BEP condition of turbine. The severe pressure fluctuations corresponding to rotor–stator interaction (RSI), standing waves, and rotating vortex rope (RVR) have been observed in the draft tube and vaneless space of the turbine. Moreover, RVR in the draft tube has been decomposed into two different modes; rotating and plunging modes. The time of occurrence of both modes was investigated in pressure and velocity data and results showed that the plunging mode appears 0.8 s before the rotating mode. In the vaneless space, the plunging mode was captured before it appears in the draft tube. The physical mechanism behind the vortex rope formation was analyzed from the instantaneous PIV velocity vector field. The development of stagnation region at the draft tube center and high axial velocity gradients along the draft tube centerline could possibly cause the formation of vortex rope.</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Cervantes, Michel J</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Gandhi, B. K</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Journal of fluids engineering</subfield><subfield code="d">New York, NY : ASME, 1973</subfield><subfield code="g">139(2017), 4</subfield><subfield code="w">(DE-627)129596396</subfield><subfield code="w">(DE-600)240774-7</subfield><subfield code="w">(DE-576)015089444</subfield><subfield code="x">0098-2202</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:139</subfield><subfield code="g">year:2017</subfield><subfield code="g">number:4</subfield></datafield><datafield tag="856" ind1="4" ind2="1"><subfield code="u">http://dx.doi.org/10.1115/1.4035224</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="856" ind1="4" ind2="2"><subfield code="u">http://dx.doi.org/10.1115/1.4035224</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_OLC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-TEC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-PHY</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_70</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_170</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_201</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2016</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4266</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4314</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">139</subfield><subfield code="j">2017</subfield><subfield code="e">4</subfield></datafield></record></collection>
|
| author |
Goyal, Rahul |
| spellingShingle |
Goyal, Rahul ddc 530 Vortex Rope Formation in a High Head Model Francis Turbine |
| authorStr |
Goyal, Rahul |
| ppnlink_with_tag_str_mv |
@@773@@(DE-627)129596396 |
| format |
Article |
| dewey-ones |
530 - Physics 620 - Engineering & allied operations |
| delete_txt_mv |
keep |
| author_role |
aut |
| collection |
OLC |
| remote_str |
false |
| illustrated |
Not Illustrated |
| issn |
0098-2202 |
| topic_title |
530 620 DNB Vortex Rope Formation in a High Head Model Francis Turbine |
| topic |
ddc 530 |
| topic_unstemmed |
ddc 530 |
| topic_browse |
ddc 530 |
| format_facet |
Aufsätze Gedruckte Aufsätze |
| format_main_str_mv |
Text Zeitschrift/Artikel |
| carriertype_str_mv |
nc |
| author2_variant |
m j c mj mjc b k g bk bkg |
| hierarchy_parent_title |
Journal of fluids engineering |
| hierarchy_parent_id |
129596396 |
| dewey-tens |
530 - Physics 620 - Engineering |
| hierarchy_top_title |
Journal of fluids engineering |
| isfreeaccess_txt |
false |
| familylinks_str_mv |
(DE-627)129596396 (DE-600)240774-7 (DE-576)015089444 |
| title |
Vortex Rope Formation in a High Head Model Francis Turbine |
| ctrlnum |
(DE-627)OLC1984343904 (DE-599)GBVOLC1984343904 (PRQ)a534-b299536b9cb49c9a82be5cca98aa9c9957ce51bea57126dfe536701de80fa880 (KEY)0030937020170000139000400000vortexropeformationinahighheadmodelfrancisturbine |
| title_full |
Vortex Rope Formation in a High Head Model Francis Turbine |
| author_sort |
Goyal, Rahul |
| journal |
Journal of fluids engineering |
| journalStr |
Journal of fluids engineering |
| lang_code |
eng |
| isOA_bool |
false |
| dewey-hundreds |
500 - Science 600 - Technology |
| recordtype |
marc |
| publishDateSort |
2017 |
| contenttype_str_mv |
txt |
| author_browse |
Goyal, Rahul |
| container_volume |
139 |
| class |
530 620 DNB |
| format_se |
Aufsätze |
| author-letter |
Goyal, Rahul |
| doi_str_mv |
10.1115/1.4035224 |
| dewey-full |
530 620 |
| title_sort |
vortex rope formation in a high head model francis turbine |
| title_auth |
Vortex Rope Formation in a High Head Model Francis Turbine |
| abstract |
Francis turbine working at off-design operating condition experiences high swirling flow at the runner outlet. In the present study, a high head model Francis turbine was experimentally investigated during load rejection, i.e., best efficiency point (BEP) to part load (PL), to detect the physical mechanism that lies in the formation of vortex rope. For that, a complete measurement system of dynamic pressure, head, flow, guide vanes (GVs) angular position, and runner shaft torque was setup with corresponding sensors at selected locations of the turbine. The measurements were synchronized with the two-dimensional (2D) particle image velocimetry (PIV) measurements of the draft tube. The study comprised an efficiency measurement and maximum hydraulic efficiency of 92.4 ± 0.15% was observed at BEP condition of turbine. The severe pressure fluctuations corresponding to rotor–stator interaction (RSI), standing waves, and rotating vortex rope (RVR) have been observed in the draft tube and vaneless space of the turbine. Moreover, RVR in the draft tube has been decomposed into two different modes; rotating and plunging modes. The time of occurrence of both modes was investigated in pressure and velocity data and results showed that the plunging mode appears 0.8 s before the rotating mode. In the vaneless space, the plunging mode was captured before it appears in the draft tube. The physical mechanism behind the vortex rope formation was analyzed from the instantaneous PIV velocity vector field. The development of stagnation region at the draft tube center and high axial velocity gradients along the draft tube centerline could possibly cause the formation of vortex rope. |
| abstractGer |
Francis turbine working at off-design operating condition experiences high swirling flow at the runner outlet. In the present study, a high head model Francis turbine was experimentally investigated during load rejection, i.e., best efficiency point (BEP) to part load (PL), to detect the physical mechanism that lies in the formation of vortex rope. For that, a complete measurement system of dynamic pressure, head, flow, guide vanes (GVs) angular position, and runner shaft torque was setup with corresponding sensors at selected locations of the turbine. The measurements were synchronized with the two-dimensional (2D) particle image velocimetry (PIV) measurements of the draft tube. The study comprised an efficiency measurement and maximum hydraulic efficiency of 92.4 ± 0.15% was observed at BEP condition of turbine. The severe pressure fluctuations corresponding to rotor–stator interaction (RSI), standing waves, and rotating vortex rope (RVR) have been observed in the draft tube and vaneless space of the turbine. Moreover, RVR in the draft tube has been decomposed into two different modes; rotating and plunging modes. The time of occurrence of both modes was investigated in pressure and velocity data and results showed that the plunging mode appears 0.8 s before the rotating mode. In the vaneless space, the plunging mode was captured before it appears in the draft tube. The physical mechanism behind the vortex rope formation was analyzed from the instantaneous PIV velocity vector field. The development of stagnation region at the draft tube center and high axial velocity gradients along the draft tube centerline could possibly cause the formation of vortex rope. |
| abstract_unstemmed |
Francis turbine working at off-design operating condition experiences high swirling flow at the runner outlet. In the present study, a high head model Francis turbine was experimentally investigated during load rejection, i.e., best efficiency point (BEP) to part load (PL), to detect the physical mechanism that lies in the formation of vortex rope. For that, a complete measurement system of dynamic pressure, head, flow, guide vanes (GVs) angular position, and runner shaft torque was setup with corresponding sensors at selected locations of the turbine. The measurements were synchronized with the two-dimensional (2D) particle image velocimetry (PIV) measurements of the draft tube. The study comprised an efficiency measurement and maximum hydraulic efficiency of 92.4 ± 0.15% was observed at BEP condition of turbine. The severe pressure fluctuations corresponding to rotor–stator interaction (RSI), standing waves, and rotating vortex rope (RVR) have been observed in the draft tube and vaneless space of the turbine. Moreover, RVR in the draft tube has been decomposed into two different modes; rotating and plunging modes. The time of occurrence of both modes was investigated in pressure and velocity data and results showed that the plunging mode appears 0.8 s before the rotating mode. In the vaneless space, the plunging mode was captured before it appears in the draft tube. The physical mechanism behind the vortex rope formation was analyzed from the instantaneous PIV velocity vector field. The development of stagnation region at the draft tube center and high axial velocity gradients along the draft tube centerline could possibly cause the formation of vortex rope. |
| collection_details |
GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_70 GBV_ILN_170 GBV_ILN_201 GBV_ILN_2016 GBV_ILN_4266 GBV_ILN_4314 |
| container_issue |
4 |
| title_short |
Vortex Rope Formation in a High Head Model Francis Turbine |
| url |
http://dx.doi.org/10.1115/1.4035224 |
| remote_bool |
false |
| author2 |
Cervantes, Michel J Gandhi, B. K |
| author2Str |
Cervantes, Michel J Gandhi, B. K |
| ppnlink |
129596396 |
| mediatype_str_mv |
n |
| isOA_txt |
false |
| hochschulschrift_bool |
false |
| author2_role |
oth oth |
| doi_str |
10.1115/1.4035224 |
| up_date |
2024-07-04T00:04:59.702Z |
| _version_ |
1803604721352572928 |
| fullrecord_marcxml |
<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a2200265 4500</leader><controlfield tag="001">OLC1984343904</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230714223633.0</controlfield><controlfield tag="007">tu</controlfield><controlfield tag="008">161202s2017 xx ||||| 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1115/1.4035224</subfield><subfield code="2">doi</subfield></datafield><datafield tag="028" ind1="5" ind2="2"><subfield code="a">PQ20170301</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)OLC1984343904</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)GBVOLC1984343904</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(PRQ)a534-b299536b9cb49c9a82be5cca98aa9c9957ce51bea57126dfe536701de80fa880</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(KEY)0030937020170000139000400000vortexropeformationinahighheadmodelfrancisturbine</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">530</subfield><subfield code="a">620</subfield><subfield code="q">DNB</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Goyal, Rahul</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Vortex Rope Formation in a High Head Model Francis Turbine</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2017</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">ohne Hilfsmittel zu benutzen</subfield><subfield code="b">n</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Band</subfield><subfield code="b">nc</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Francis turbine working at off-design operating condition experiences high swirling flow at the runner outlet. In the present study, a high head model Francis turbine was experimentally investigated during load rejection, i.e., best efficiency point (BEP) to part load (PL), to detect the physical mechanism that lies in the formation of vortex rope. For that, a complete measurement system of dynamic pressure, head, flow, guide vanes (GVs) angular position, and runner shaft torque was setup with corresponding sensors at selected locations of the turbine. The measurements were synchronized with the two-dimensional (2D) particle image velocimetry (PIV) measurements of the draft tube. The study comprised an efficiency measurement and maximum hydraulic efficiency of 92.4 ± 0.15% was observed at BEP condition of turbine. The severe pressure fluctuations corresponding to rotor–stator interaction (RSI), standing waves, and rotating vortex rope (RVR) have been observed in the draft tube and vaneless space of the turbine. Moreover, RVR in the draft tube has been decomposed into two different modes; rotating and plunging modes. The time of occurrence of both modes was investigated in pressure and velocity data and results showed that the plunging mode appears 0.8 s before the rotating mode. In the vaneless space, the plunging mode was captured before it appears in the draft tube. The physical mechanism behind the vortex rope formation was analyzed from the instantaneous PIV velocity vector field. The development of stagnation region at the draft tube center and high axial velocity gradients along the draft tube centerline could possibly cause the formation of vortex rope.</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Cervantes, Michel J</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Gandhi, B. K</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Journal of fluids engineering</subfield><subfield code="d">New York, NY : ASME, 1973</subfield><subfield code="g">139(2017), 4</subfield><subfield code="w">(DE-627)129596396</subfield><subfield code="w">(DE-600)240774-7</subfield><subfield code="w">(DE-576)015089444</subfield><subfield code="x">0098-2202</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:139</subfield><subfield code="g">year:2017</subfield><subfield code="g">number:4</subfield></datafield><datafield tag="856" ind1="4" ind2="1"><subfield code="u">http://dx.doi.org/10.1115/1.4035224</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="856" ind1="4" ind2="2"><subfield code="u">http://dx.doi.org/10.1115/1.4035224</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_OLC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-TEC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-PHY</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_70</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_170</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_201</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2016</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4266</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4314</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">139</subfield><subfield code="j">2017</subfield><subfield code="e">4</subfield></datafield></record></collection>
|
| score |
7.402194 |