Investigation of flat plate type pulsating heat pipes via flow visualization-assisted experiments: Effect of cross sectional ratio

In the present study, combined influence of filling ratio, geometry, inclination angle and heating power on heat transfer characteristics of the pulsating heat pipes (PHPs) are investigated accompanying analysis of complex thermophysical mechanism. Three different flat-plate type closed loop PHPs co...
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Gespeichert in:

Autor*in:	Markal, Burak [verfasserIn] Candere, Ayse [verfasserIn] Avci, Mete [verfasserIn] Aydin, Orhan [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2021

Schlagwörter:	Pulsating heat pipe Thermal behavior Visualization Experimental investigation

Übergeordnetes Werk:	Enthalten in: International communications in heat and mass transfer - Amsterdam [u.a.] : Elsevier Science, 1983, 125
Übergeordnetes Werk:	volume:125

DOI / URN:	10.1016/j.icheatmasstransfer.2021.105289

Katalog-ID:	ELV054297109

Internformat


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520			\|a In the present study, combined influence of filling ratio, geometry, inclination angle and heating power on heat transfer characteristics of the pulsating heat pipes (PHPs) are investigated accompanying analysis of complex thermophysical mechanism. Three different flat-plate type closed loop PHPs covering uniform or non-uniform channel-pairs are investigated at different angles (0° − 90°) and filling ratios (50% and 80%). It is concluded that phase change phenomena and bubble dynamics play key roles on thermal characteristics. In addition to unbalanced capillary force, evaporation momentum force is an important factor to improve operational performance of non-uniform PHPs in the lack of gravity support. Non-uniform design decreases the influence of gravity on results. At horizontal position for medium filling ratio (FR = 50%), uniform PHP (PHP1) collapses. Compared to angled conditions, maximum heat input of PHP1 drops from 65 W to 45 W (nearly 30% decrease). At horizontal orientation, non-uniform PHPs maintain operation, and perform better performance than PHP1. For a relatively high filling ratio (FR = 80%), effect of inclination angle is more obvious, especially for uniform PHP. In the existence of liquid-excess (at FR = 80%), a new type operation mode is defined as column type bulk condensation flow.
650		4	\|a Pulsating heat pipe
650		4	\|a Thermal behavior
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650		4	\|a Experimental investigation
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700	1		\|a Avci, Mete \|e verfasserin \|4 aut
700	1		\|a Aydin, Orhan \|e verfasserin \|4 aut
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matchkey_str	markalburakcandereayseavcimeteaydinorhan:2021----:netgtoofapaeyeustnhappsifovsaiainsitdxeiet
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publishDate	2021
allfields	10.1016/j.icheatmasstransfer.2021.105289 doi (DE-627)ELV054297109 (ELSEVIER)S0735-1933(21)00183-4 DE-627 ger DE-627 rda eng 620 VZ 50.38 bkl Markal, Burak verfasserin aut Investigation of flat plate type pulsating heat pipes via flow visualization-assisted experiments: Effect of cross sectional ratio 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In the present study, combined influence of filling ratio, geometry, inclination angle and heating power on heat transfer characteristics of the pulsating heat pipes (PHPs) are investigated accompanying analysis of complex thermophysical mechanism. Three different flat-plate type closed loop PHPs covering uniform or non-uniform channel-pairs are investigated at different angles (0° − 90°) and filling ratios (50% and 80%). It is concluded that phase change phenomena and bubble dynamics play key roles on thermal characteristics. In addition to unbalanced capillary force, evaporation momentum force is an important factor to improve operational performance of non-uniform PHPs in the lack of gravity support. Non-uniform design decreases the influence of gravity on results. At horizontal position for medium filling ratio (FR = 50%), uniform PHP (PHP1) collapses. Compared to angled conditions, maximum heat input of PHP1 drops from 65 W to 45 W (nearly 30% decrease). At horizontal orientation, non-uniform PHPs maintain operation, and perform better performance than PHP1. For a relatively high filling ratio (FR = 80%), effect of inclination angle is more obvious, especially for uniform PHP. In the existence of liquid-excess (at FR = 80%), a new type operation mode is defined as column type bulk condensation flow. Pulsating heat pipe Thermal behavior Visualization Experimental investigation Candere, Ayse verfasserin aut Avci, Mete verfasserin aut Aydin, Orhan verfasserin aut Enthalten in International communications in heat and mass transfer Amsterdam [u.a.] : Elsevier Science, 1983 125 Online-Ressource (DE-627)320604373 (DE-600)2020560-0 (DE-576)096806710 nnns volume:125 GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 50.38 Technische Thermodynamik VZ AR 125
spelling	10.1016/j.icheatmasstransfer.2021.105289 doi (DE-627)ELV054297109 (ELSEVIER)S0735-1933(21)00183-4 DE-627 ger DE-627 rda eng 620 VZ 50.38 bkl Markal, Burak verfasserin aut Investigation of flat plate type pulsating heat pipes via flow visualization-assisted experiments: Effect of cross sectional ratio 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In the present study, combined influence of filling ratio, geometry, inclination angle and heating power on heat transfer characteristics of the pulsating heat pipes (PHPs) are investigated accompanying analysis of complex thermophysical mechanism. Three different flat-plate type closed loop PHPs covering uniform or non-uniform channel-pairs are investigated at different angles (0° − 90°) and filling ratios (50% and 80%). It is concluded that phase change phenomena and bubble dynamics play key roles on thermal characteristics. In addition to unbalanced capillary force, evaporation momentum force is an important factor to improve operational performance of non-uniform PHPs in the lack of gravity support. Non-uniform design decreases the influence of gravity on results. At horizontal position for medium filling ratio (FR = 50%), uniform PHP (PHP1) collapses. Compared to angled conditions, maximum heat input of PHP1 drops from 65 W to 45 W (nearly 30% decrease). At horizontal orientation, non-uniform PHPs maintain operation, and perform better performance than PHP1. For a relatively high filling ratio (FR = 80%), effect of inclination angle is more obvious, especially for uniform PHP. In the existence of liquid-excess (at FR = 80%), a new type operation mode is defined as column type bulk condensation flow. Pulsating heat pipe Thermal behavior Visualization Experimental investigation Candere, Ayse verfasserin aut Avci, Mete verfasserin aut Aydin, Orhan verfasserin aut Enthalten in International communications in heat and mass transfer Amsterdam [u.a.] : Elsevier Science, 1983 125 Online-Ressource (DE-627)320604373 (DE-600)2020560-0 (DE-576)096806710 nnns volume:125 GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 50.38 Technische Thermodynamik VZ AR 125
allfields_unstemmed	10.1016/j.icheatmasstransfer.2021.105289 doi (DE-627)ELV054297109 (ELSEVIER)S0735-1933(21)00183-4 DE-627 ger DE-627 rda eng 620 VZ 50.38 bkl Markal, Burak verfasserin aut Investigation of flat plate type pulsating heat pipes via flow visualization-assisted experiments: Effect of cross sectional ratio 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In the present study, combined influence of filling ratio, geometry, inclination angle and heating power on heat transfer characteristics of the pulsating heat pipes (PHPs) are investigated accompanying analysis of complex thermophysical mechanism. Three different flat-plate type closed loop PHPs covering uniform or non-uniform channel-pairs are investigated at different angles (0° − 90°) and filling ratios (50% and 80%). It is concluded that phase change phenomena and bubble dynamics play key roles on thermal characteristics. In addition to unbalanced capillary force, evaporation momentum force is an important factor to improve operational performance of non-uniform PHPs in the lack of gravity support. Non-uniform design decreases the influence of gravity on results. At horizontal position for medium filling ratio (FR = 50%), uniform PHP (PHP1) collapses. Compared to angled conditions, maximum heat input of PHP1 drops from 65 W to 45 W (nearly 30% decrease). At horizontal orientation, non-uniform PHPs maintain operation, and perform better performance than PHP1. For a relatively high filling ratio (FR = 80%), effect of inclination angle is more obvious, especially for uniform PHP. In the existence of liquid-excess (at FR = 80%), a new type operation mode is defined as column type bulk condensation flow. Pulsating heat pipe Thermal behavior Visualization Experimental investigation Candere, Ayse verfasserin aut Avci, Mete verfasserin aut Aydin, Orhan verfasserin aut Enthalten in International communications in heat and mass transfer Amsterdam [u.a.] : Elsevier Science, 1983 125 Online-Ressource (DE-627)320604373 (DE-600)2020560-0 (DE-576)096806710 nnns volume:125 GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 50.38 Technische Thermodynamik VZ AR 125
allfieldsGer	10.1016/j.icheatmasstransfer.2021.105289 doi (DE-627)ELV054297109 (ELSEVIER)S0735-1933(21)00183-4 DE-627 ger DE-627 rda eng 620 VZ 50.38 bkl Markal, Burak verfasserin aut Investigation of flat plate type pulsating heat pipes via flow visualization-assisted experiments: Effect of cross sectional ratio 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In the present study, combined influence of filling ratio, geometry, inclination angle and heating power on heat transfer characteristics of the pulsating heat pipes (PHPs) are investigated accompanying analysis of complex thermophysical mechanism. Three different flat-plate type closed loop PHPs covering uniform or non-uniform channel-pairs are investigated at different angles (0° − 90°) and filling ratios (50% and 80%). It is concluded that phase change phenomena and bubble dynamics play key roles on thermal characteristics. In addition to unbalanced capillary force, evaporation momentum force is an important factor to improve operational performance of non-uniform PHPs in the lack of gravity support. Non-uniform design decreases the influence of gravity on results. At horizontal position for medium filling ratio (FR = 50%), uniform PHP (PHP1) collapses. Compared to angled conditions, maximum heat input of PHP1 drops from 65 W to 45 W (nearly 30% decrease). At horizontal orientation, non-uniform PHPs maintain operation, and perform better performance than PHP1. For a relatively high filling ratio (FR = 80%), effect of inclination angle is more obvious, especially for uniform PHP. In the existence of liquid-excess (at FR = 80%), a new type operation mode is defined as column type bulk condensation flow. Pulsating heat pipe Thermal behavior Visualization Experimental investigation Candere, Ayse verfasserin aut Avci, Mete verfasserin aut Aydin, Orhan verfasserin aut Enthalten in International communications in heat and mass transfer Amsterdam [u.a.] : Elsevier Science, 1983 125 Online-Ressource (DE-627)320604373 (DE-600)2020560-0 (DE-576)096806710 nnns volume:125 GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 50.38 Technische Thermodynamik VZ AR 125
allfieldsSound	10.1016/j.icheatmasstransfer.2021.105289 doi (DE-627)ELV054297109 (ELSEVIER)S0735-1933(21)00183-4 DE-627 ger DE-627 rda eng 620 VZ 50.38 bkl Markal, Burak verfasserin aut Investigation of flat plate type pulsating heat pipes via flow visualization-assisted experiments: Effect of cross sectional ratio 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In the present study, combined influence of filling ratio, geometry, inclination angle and heating power on heat transfer characteristics of the pulsating heat pipes (PHPs) are investigated accompanying analysis of complex thermophysical mechanism. Three different flat-plate type closed loop PHPs covering uniform or non-uniform channel-pairs are investigated at different angles (0° − 90°) and filling ratios (50% and 80%). It is concluded that phase change phenomena and bubble dynamics play key roles on thermal characteristics. In addition to unbalanced capillary force, evaporation momentum force is an important factor to improve operational performance of non-uniform PHPs in the lack of gravity support. Non-uniform design decreases the influence of gravity on results. At horizontal position for medium filling ratio (FR = 50%), uniform PHP (PHP1) collapses. Compared to angled conditions, maximum heat input of PHP1 drops from 65 W to 45 W (nearly 30% decrease). At horizontal orientation, non-uniform PHPs maintain operation, and perform better performance than PHP1. For a relatively high filling ratio (FR = 80%), effect of inclination angle is more obvious, especially for uniform PHP. In the existence of liquid-excess (at FR = 80%), a new type operation mode is defined as column type bulk condensation flow. Pulsating heat pipe Thermal behavior Visualization Experimental investigation Candere, Ayse verfasserin aut Avci, Mete verfasserin aut Aydin, Orhan verfasserin aut Enthalten in International communications in heat and mass transfer Amsterdam [u.a.] : Elsevier Science, 1983 125 Online-Ressource (DE-627)320604373 (DE-600)2020560-0 (DE-576)096806710 nnns volume:125 GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 50.38 Technische Thermodynamik VZ AR 125
language	English
source	Enthalten in International communications in heat and mass transfer 125 volume:125
sourceStr	Enthalten in International communications in heat and mass transfer 125 volume:125
format_phy_str_mv	Article
bklname	Technische Thermodynamik
institution	findex.gbv.de
topic_facet	Pulsating heat pipe Thermal behavior Visualization Experimental investigation
dewey-raw	620
isfreeaccess_bool	false
container_title	International communications in heat and mass transfer
authorswithroles_txt_mv	Markal, Burak @@aut@@ Candere, Ayse @@aut@@ Avci, Mete @@aut@@ Aydin, Orhan @@aut@@
publishDateDaySort_date	2021-01-01T00:00:00Z
hierarchy_top_id	320604373
dewey-sort	3620
id	ELV054297109
language_de	englisch
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author	Markal, Burak
spellingShingle	Markal, Burak ddc 620 bkl 50.38 misc Pulsating heat pipe misc Thermal behavior misc Visualization misc Experimental investigation Investigation of flat plate type pulsating heat pipes via flow visualization-assisted experiments: Effect of cross sectional ratio
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topic_title	620 VZ 50.38 bkl Investigation of flat plate type pulsating heat pipes via flow visualization-assisted experiments: Effect of cross sectional ratio Pulsating heat pipe Thermal behavior Visualization Experimental investigation
topic	ddc 620 bkl 50.38 misc Pulsating heat pipe misc Thermal behavior misc Visualization misc Experimental investigation
topic_unstemmed	ddc 620 bkl 50.38 misc Pulsating heat pipe misc Thermal behavior misc Visualization misc Experimental investigation
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title	Investigation of flat plate type pulsating heat pipes via flow visualization-assisted experiments: Effect of cross sectional ratio
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title_full	Investigation of flat plate type pulsating heat pipes via flow visualization-assisted experiments: Effect of cross sectional ratio
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title_sort	investigation of flat plate type pulsating heat pipes via flow visualization-assisted experiments: effect of cross sectional ratio
title_auth	Investigation of flat plate type pulsating heat pipes via flow visualization-assisted experiments: Effect of cross sectional ratio
abstract	In the present study, combined influence of filling ratio, geometry, inclination angle and heating power on heat transfer characteristics of the pulsating heat pipes (PHPs) are investigated accompanying analysis of complex thermophysical mechanism. Three different flat-plate type closed loop PHPs covering uniform or non-uniform channel-pairs are investigated at different angles (0° − 90°) and filling ratios (50% and 80%). It is concluded that phase change phenomena and bubble dynamics play key roles on thermal characteristics. In addition to unbalanced capillary force, evaporation momentum force is an important factor to improve operational performance of non-uniform PHPs in the lack of gravity support. Non-uniform design decreases the influence of gravity on results. At horizontal position for medium filling ratio (FR = 50%), uniform PHP (PHP1) collapses. Compared to angled conditions, maximum heat input of PHP1 drops from 65 W to 45 W (nearly 30% decrease). At horizontal orientation, non-uniform PHPs maintain operation, and perform better performance than PHP1. For a relatively high filling ratio (FR = 80%), effect of inclination angle is more obvious, especially for uniform PHP. In the existence of liquid-excess (at FR = 80%), a new type operation mode is defined as column type bulk condensation flow.
abstractGer	In the present study, combined influence of filling ratio, geometry, inclination angle and heating power on heat transfer characteristics of the pulsating heat pipes (PHPs) are investigated accompanying analysis of complex thermophysical mechanism. Three different flat-plate type closed loop PHPs covering uniform or non-uniform channel-pairs are investigated at different angles (0° − 90°) and filling ratios (50% and 80%). It is concluded that phase change phenomena and bubble dynamics play key roles on thermal characteristics. In addition to unbalanced capillary force, evaporation momentum force is an important factor to improve operational performance of non-uniform PHPs in the lack of gravity support. Non-uniform design decreases the influence of gravity on results. At horizontal position for medium filling ratio (FR = 50%), uniform PHP (PHP1) collapses. Compared to angled conditions, maximum heat input of PHP1 drops from 65 W to 45 W (nearly 30% decrease). At horizontal orientation, non-uniform PHPs maintain operation, and perform better performance than PHP1. For a relatively high filling ratio (FR = 80%), effect of inclination angle is more obvious, especially for uniform PHP. In the existence of liquid-excess (at FR = 80%), a new type operation mode is defined as column type bulk condensation flow.
abstract_unstemmed	In the present study, combined influence of filling ratio, geometry, inclination angle and heating power on heat transfer characteristics of the pulsating heat pipes (PHPs) are investigated accompanying analysis of complex thermophysical mechanism. Three different flat-plate type closed loop PHPs covering uniform or non-uniform channel-pairs are investigated at different angles (0° − 90°) and filling ratios (50% and 80%). It is concluded that phase change phenomena and bubble dynamics play key roles on thermal characteristics. In addition to unbalanced capillary force, evaporation momentum force is an important factor to improve operational performance of non-uniform PHPs in the lack of gravity support. Non-uniform design decreases the influence of gravity on results. At horizontal position for medium filling ratio (FR = 50%), uniform PHP (PHP1) collapses. Compared to angled conditions, maximum heat input of PHP1 drops from 65 W to 45 W (nearly 30% decrease). At horizontal orientation, non-uniform PHPs maintain operation, and perform better performance than PHP1. For a relatively high filling ratio (FR = 80%), effect of inclination angle is more obvious, especially for uniform PHP. In the existence of liquid-excess (at FR = 80%), a new type operation mode is defined as column type bulk condensation flow.
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title_short	Investigation of flat plate type pulsating heat pipes via flow visualization-assisted experiments: Effect of cross sectional ratio
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up_date	2024-07-06T21:20:07.277Z
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Investigation of flat plate type pulsating heat pipes via flow visualization-assisted experiments: Effect of cross sectional ratio

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