A study of aerodynamic sound generated from an airfoil placed in a flow with turbulence (1st report: In the case of airfoil subjected to homogeneous turbulence)

Sound generated aerodynamically from a flow around an airfoil subjected to inflow turbulence is investigated experimentally as well as numerically to identify the dominant source of the sound. The test airfoil has NACA0012 wing section with a chord length of 150 mm and a spanwise length of 500 mm. T...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Noriaki KOBAYASHI [verfasserIn] Yasumasa SUZUKI [verfasserIn] Chisachi KATO [verfasserIn]

Format:	E-Artikel
Sprache:	Japanisch

Erschienen:	2020

Schlagwörter:	wind-tunnel experiment large eddy simulation inflow turbulence active turbulence generator leading edge noise

Übergeordnetes Werk:	In: Nihon Kikai Gakkai ronbunshu - The Japan Society of Mechanical Engineers, 2022, 86(2020), 881, Seite 19-00336-19-00336
Übergeordnetes Werk:	volume:86 ; year:2020 ; number:881 ; pages:19-00336-19-00336

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1299/transjsme.19-00336

Katalog-ID:	DOAJ085956473

Internformat


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520			\|a Sound generated aerodynamically from a flow around an airfoil subjected to inflow turbulence is investigated experimentally as well as numerically to identify the dominant source of the sound. The test airfoil has NACA0012 wing section with a chord length of 150 mm and a spanwise length of 500 mm. The wind speed is set to 30 m/s, which results in an airfoil Reynolds number of 3.0×105. Wind tunnel experiments are conducted with Active Turbulence Generator (ATG) set at the nozzle exit to control the turbulence intensity and the eddy scale of the inflow turbulence, independently. The former is varied from 10 % to 20 % while the latter is varied from 300 mm to 1600 mm. Large eddy simulation (LES) with turbulent grids is also performed to investigate the flow field around the airfoil in further detail, for which the turbulence intensity is 10 % and the eddy scale is 3.75 mm. As a result, we have found that the pressure fluctuation near the leading edge of the airfoil is remarkably high, and therefore, it is most likely the cause of the considerable increase in the sound generated from the airfoil. In addition, the correlation between the airfoil lift force and the angle of attack for the airfoil subjected to the inflow turbulence is not very high, and therefore, the change in the lift force due to the change in the angle of attack is least likely to the cause of increase in the sound.
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spelling	10.1299/transjsme.19-00336 doi (DE-627)DOAJ085956473 (DE-599)DOAJ4da034e87fcb45a1a6e616f0c0bf1eab DE-627 ger DE-627 rakwb jpn TJ1-1570 TA213-215 Noriaki KOBAYASHI verfasserin aut A study of aerodynamic sound generated from an airfoil placed in a flow with turbulence (1st report: In the case of airfoil subjected to homogeneous turbulence) 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Sound generated aerodynamically from a flow around an airfoil subjected to inflow turbulence is investigated experimentally as well as numerically to identify the dominant source of the sound. The test airfoil has NACA0012 wing section with a chord length of 150 mm and a spanwise length of 500 mm. The wind speed is set to 30 m/s, which results in an airfoil Reynolds number of 3.0×105. Wind tunnel experiments are conducted with Active Turbulence Generator (ATG) set at the nozzle exit to control the turbulence intensity and the eddy scale of the inflow turbulence, independently. The former is varied from 10 % to 20 % while the latter is varied from 300 mm to 1600 mm. Large eddy simulation (LES) with turbulent grids is also performed to investigate the flow field around the airfoil in further detail, for which the turbulence intensity is 10 % and the eddy scale is 3.75 mm. As a result, we have found that the pressure fluctuation near the leading edge of the airfoil is remarkably high, and therefore, it is most likely the cause of the considerable increase in the sound generated from the airfoil. In addition, the correlation between the airfoil lift force and the angle of attack for the airfoil subjected to the inflow turbulence is not very high, and therefore, the change in the lift force due to the change in the angle of attack is least likely to the cause of increase in the sound. wind-tunnel experiment large eddy simulation inflow turbulence active turbulence generator leading edge noise Mechanical engineering and machinery Engineering machinery, tools, and implements Yasumasa SUZUKI verfasserin aut Chisachi KATO verfasserin aut In Nihon Kikai Gakkai ronbunshu The Japan Society of Mechanical Engineers, 2022 86(2020), 881, Seite 19-00336-19-00336 (DE-627)1028882408 21879761 nnns volume:86 year:2020 number:881 pages:19-00336-19-00336 https://doi.org/10.1299/transjsme.19-00336 kostenfrei https://doaj.org/article/4da034e87fcb45a1a6e616f0c0bf1eab kostenfrei https://www.jstage.jst.go.jp/article/transjsme/86/881/86_19-00336/_pdf/-char/en kostenfrei https://doaj.org/toc/2187-9761 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 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_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 86 2020 881 19-00336-19-00336
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allfieldsGer	10.1299/transjsme.19-00336 doi (DE-627)DOAJ085956473 (DE-599)DOAJ4da034e87fcb45a1a6e616f0c0bf1eab DE-627 ger DE-627 rakwb jpn TJ1-1570 TA213-215 Noriaki KOBAYASHI verfasserin aut A study of aerodynamic sound generated from an airfoil placed in a flow with turbulence (1st report: In the case of airfoil subjected to homogeneous turbulence) 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Sound generated aerodynamically from a flow around an airfoil subjected to inflow turbulence is investigated experimentally as well as numerically to identify the dominant source of the sound. The test airfoil has NACA0012 wing section with a chord length of 150 mm and a spanwise length of 500 mm. The wind speed is set to 30 m/s, which results in an airfoil Reynolds number of 3.0×105. Wind tunnel experiments are conducted with Active Turbulence Generator (ATG) set at the nozzle exit to control the turbulence intensity and the eddy scale of the inflow turbulence, independently. The former is varied from 10 % to 20 % while the latter is varied from 300 mm to 1600 mm. Large eddy simulation (LES) with turbulent grids is also performed to investigate the flow field around the airfoil in further detail, for which the turbulence intensity is 10 % and the eddy scale is 3.75 mm. As a result, we have found that the pressure fluctuation near the leading edge of the airfoil is remarkably high, and therefore, it is most likely the cause of the considerable increase in the sound generated from the airfoil. In addition, the correlation between the airfoil lift force and the angle of attack for the airfoil subjected to the inflow turbulence is not very high, and therefore, the change in the lift force due to the change in the angle of attack is least likely to the cause of increase in the sound. wind-tunnel experiment large eddy simulation inflow turbulence active turbulence generator leading edge noise Mechanical engineering and machinery Engineering machinery, tools, and implements Yasumasa SUZUKI verfasserin aut Chisachi KATO verfasserin aut In Nihon Kikai Gakkai ronbunshu The Japan Society of Mechanical Engineers, 2022 86(2020), 881, Seite 19-00336-19-00336 (DE-627)1028882408 21879761 nnns volume:86 year:2020 number:881 pages:19-00336-19-00336 https://doi.org/10.1299/transjsme.19-00336 kostenfrei https://doaj.org/article/4da034e87fcb45a1a6e616f0c0bf1eab kostenfrei https://www.jstage.jst.go.jp/article/transjsme/86/881/86_19-00336/_pdf/-char/en kostenfrei https://doaj.org/toc/2187-9761 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 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_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 86 2020 881 19-00336-19-00336
allfieldsSound	10.1299/transjsme.19-00336 doi (DE-627)DOAJ085956473 (DE-599)DOAJ4da034e87fcb45a1a6e616f0c0bf1eab DE-627 ger DE-627 rakwb jpn TJ1-1570 TA213-215 Noriaki KOBAYASHI verfasserin aut A study of aerodynamic sound generated from an airfoil placed in a flow with turbulence (1st report: In the case of airfoil subjected to homogeneous turbulence) 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Sound generated aerodynamically from a flow around an airfoil subjected to inflow turbulence is investigated experimentally as well as numerically to identify the dominant source of the sound. The test airfoil has NACA0012 wing section with a chord length of 150 mm and a spanwise length of 500 mm. The wind speed is set to 30 m/s, which results in an airfoil Reynolds number of 3.0×105. Wind tunnel experiments are conducted with Active Turbulence Generator (ATG) set at the nozzle exit to control the turbulence intensity and the eddy scale of the inflow turbulence, independently. The former is varied from 10 % to 20 % while the latter is varied from 300 mm to 1600 mm. Large eddy simulation (LES) with turbulent grids is also performed to investigate the flow field around the airfoil in further detail, for which the turbulence intensity is 10 % and the eddy scale is 3.75 mm. As a result, we have found that the pressure fluctuation near the leading edge of the airfoil is remarkably high, and therefore, it is most likely the cause of the considerable increase in the sound generated from the airfoil. In addition, the correlation between the airfoil lift force and the angle of attack for the airfoil subjected to the inflow turbulence is not very high, and therefore, the change in the lift force due to the change in the angle of attack is least likely to the cause of increase in the sound. wind-tunnel experiment large eddy simulation inflow turbulence active turbulence generator leading edge noise Mechanical engineering and machinery Engineering machinery, tools, and implements Yasumasa SUZUKI verfasserin aut Chisachi KATO verfasserin aut In Nihon Kikai Gakkai ronbunshu The Japan Society of Mechanical Engineers, 2022 86(2020), 881, Seite 19-00336-19-00336 (DE-627)1028882408 21879761 nnns volume:86 year:2020 number:881 pages:19-00336-19-00336 https://doi.org/10.1299/transjsme.19-00336 kostenfrei https://doaj.org/article/4da034e87fcb45a1a6e616f0c0bf1eab kostenfrei https://www.jstage.jst.go.jp/article/transjsme/86/881/86_19-00336/_pdf/-char/en kostenfrei https://doaj.org/toc/2187-9761 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 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_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 86 2020 881 19-00336-19-00336
language	Japanese
source	In Nihon Kikai Gakkai ronbunshu 86(2020), 881, Seite 19-00336-19-00336 volume:86 year:2020 number:881 pages:19-00336-19-00336
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callnumber-first	T - Technology
author	Noriaki KOBAYASHI
spellingShingle	Noriaki KOBAYASHI misc TJ1-1570 misc TA213-215 misc wind-tunnel experiment misc large eddy simulation misc inflow turbulence misc active turbulence generator misc leading edge noise misc Mechanical engineering and machinery misc Engineering machinery, tools, and implements A study of aerodynamic sound generated from an airfoil placed in a flow with turbulence (1st report: In the case of airfoil subjected to homogeneous turbulence)
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topic_title	TJ1-1570 TA213-215 A study of aerodynamic sound generated from an airfoil placed in a flow with turbulence (1st report: In the case of airfoil subjected to homogeneous turbulence) wind-tunnel experiment large eddy simulation inflow turbulence active turbulence generator leading edge noise
topic	misc TJ1-1570 misc TA213-215 misc wind-tunnel experiment misc large eddy simulation misc inflow turbulence misc active turbulence generator misc leading edge noise misc Mechanical engineering and machinery misc Engineering machinery, tools, and implements
topic_unstemmed	misc TJ1-1570 misc TA213-215 misc wind-tunnel experiment misc large eddy simulation misc inflow turbulence misc active turbulence generator misc leading edge noise misc Mechanical engineering and machinery misc Engineering machinery, tools, and implements
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title	A study of aerodynamic sound generated from an airfoil placed in a flow with turbulence (1st report: In the case of airfoil subjected to homogeneous turbulence)
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title_full	A study of aerodynamic sound generated from an airfoil placed in a flow with turbulence (1st report: In the case of airfoil subjected to homogeneous turbulence)
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title_sort	study of aerodynamic sound generated from an airfoil placed in a flow with turbulence (1st report: in the case of airfoil subjected to homogeneous turbulence)
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title_auth	A study of aerodynamic sound generated from an airfoil placed in a flow with turbulence (1st report: In the case of airfoil subjected to homogeneous turbulence)
abstract	Sound generated aerodynamically from a flow around an airfoil subjected to inflow turbulence is investigated experimentally as well as numerically to identify the dominant source of the sound. The test airfoil has NACA0012 wing section with a chord length of 150 mm and a spanwise length of 500 mm. The wind speed is set to 30 m/s, which results in an airfoil Reynolds number of 3.0×105. Wind tunnel experiments are conducted with Active Turbulence Generator (ATG) set at the nozzle exit to control the turbulence intensity and the eddy scale of the inflow turbulence, independently. The former is varied from 10 % to 20 % while the latter is varied from 300 mm to 1600 mm. Large eddy simulation (LES) with turbulent grids is also performed to investigate the flow field around the airfoil in further detail, for which the turbulence intensity is 10 % and the eddy scale is 3.75 mm. As a result, we have found that the pressure fluctuation near the leading edge of the airfoil is remarkably high, and therefore, it is most likely the cause of the considerable increase in the sound generated from the airfoil. In addition, the correlation between the airfoil lift force and the angle of attack for the airfoil subjected to the inflow turbulence is not very high, and therefore, the change in the lift force due to the change in the angle of attack is least likely to the cause of increase in the sound.
abstractGer	Sound generated aerodynamically from a flow around an airfoil subjected to inflow turbulence is investigated experimentally as well as numerically to identify the dominant source of the sound. The test airfoil has NACA0012 wing section with a chord length of 150 mm and a spanwise length of 500 mm. The wind speed is set to 30 m/s, which results in an airfoil Reynolds number of 3.0×105. Wind tunnel experiments are conducted with Active Turbulence Generator (ATG) set at the nozzle exit to control the turbulence intensity and the eddy scale of the inflow turbulence, independently. The former is varied from 10 % to 20 % while the latter is varied from 300 mm to 1600 mm. Large eddy simulation (LES) with turbulent grids is also performed to investigate the flow field around the airfoil in further detail, for which the turbulence intensity is 10 % and the eddy scale is 3.75 mm. As a result, we have found that the pressure fluctuation near the leading edge of the airfoil is remarkably high, and therefore, it is most likely the cause of the considerable increase in the sound generated from the airfoil. In addition, the correlation between the airfoil lift force and the angle of attack for the airfoil subjected to the inflow turbulence is not very high, and therefore, the change in the lift force due to the change in the angle of attack is least likely to the cause of increase in the sound.
abstract_unstemmed	Sound generated aerodynamically from a flow around an airfoil subjected to inflow turbulence is investigated experimentally as well as numerically to identify the dominant source of the sound. The test airfoil has NACA0012 wing section with a chord length of 150 mm and a spanwise length of 500 mm. The wind speed is set to 30 m/s, which results in an airfoil Reynolds number of 3.0×105. Wind tunnel experiments are conducted with Active Turbulence Generator (ATG) set at the nozzle exit to control the turbulence intensity and the eddy scale of the inflow turbulence, independently. The former is varied from 10 % to 20 % while the latter is varied from 300 mm to 1600 mm. Large eddy simulation (LES) with turbulent grids is also performed to investigate the flow field around the airfoil in further detail, for which the turbulence intensity is 10 % and the eddy scale is 3.75 mm. As a result, we have found that the pressure fluctuation near the leading edge of the airfoil is remarkably high, and therefore, it is most likely the cause of the considerable increase in the sound generated from the airfoil. In addition, the correlation between the airfoil lift force and the angle of attack for the airfoil subjected to the inflow turbulence is not very high, and therefore, the change in the lift force due to the change in the angle of attack is least likely to the cause of increase in the sound.
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title_short	A study of aerodynamic sound generated from an airfoil placed in a flow with turbulence (1st report: In the case of airfoil subjected to homogeneous turbulence)
url	https://doi.org/10.1299/transjsme.19-00336 https://doaj.org/article/4da034e87fcb45a1a6e616f0c0bf1eab https://www.jstage.jst.go.jp/article/transjsme/86/881/86_19-00336/_pdf/-char/en https://doaj.org/toc/2187-9761
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author2	Yasumasa SUZUKI Chisachi KATO
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A study of aerodynamic sound generated from an airfoil placed in a flow with turbulence (1st report: In the case of airfoil subjected to homogeneous turbulence)

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