Effects of internal Acoustic Excitation on the Improvementof Airfoil Performance

The effect of internal acoustic excitation on the leading-edge, separated boundary layers and the aerodynamic performance of NACA23015 cross section airfoil are examined as a function of excitation location with ranging frequency range (50-400) Hz of the introduced acoustic. Tests are separately con...

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Autor principal:	Ikhlase M.Fayed
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2007
Materias:	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/d8b0587a497d427f9b3a7b7c8f5dae66
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id	oai:doaj.org-article:d8b0587a497d427f9b3a7b7c8f5dae66
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spelling	oai:doaj.org-article:d8b0587a497d427f9b3a7b7c8f5dae662021-12-02T05:28:19ZEffects of internal Acoustic Excitation on the Improvementof Airfoil Performance1818-1171https://doaj.org/article/d8b0587a497d427f9b3a7b7c8f5dae662007-01-01T00:00:00Zhttp://www.iasj.net/iasj?func=fulltext&aId=2359https://doaj.org/toc/1818-1171The effect of internal acoustic excitation on the leading-edge, separated boundary layers and the aerodynamic performance of NACA23015 cross section airfoil are examined as a function of excitation location with ranging frequency range (50-400) Hz of the introduced acoustic. Tests are separately conducted in two sections, open type wind tunnels at the Reynolds number of 3.3x105 for measurement at angle of attack (0, 3, 6, 9 &12) deg. and 3x104 for the visualization at angle of attack (12) deg. based on the airfoil chord. Results indicated that the excitation frequency and the excitation location are the key parameters to alter the flow properties and thus to improve the aerodynamic performance. The most effective excitation frequency is found to be equal to the shear layer instability frequency and on excitation location close to the separation point. Moreover, the lift is increased and drag reduced dramatically. The corresponding boundary layers are visualized to be reattached to the surface. Ikhlase M.FayedAl-Khwarizmi College of Engineering – University of BaghdadarticleChemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 3, Iss 3, Pp 66-88 (2007)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Ikhlase M.Fayed Effects of internal Acoustic Excitation on the Improvementof Airfoil Performance
description	The effect of internal acoustic excitation on the leading-edge, separated boundary layers and the aerodynamic performance of NACA23015 cross section airfoil are examined as a function of excitation location with ranging frequency range (50-400) Hz of the introduced acoustic. Tests are separately conducted in two sections, open type wind tunnels at the Reynolds number of 3.3x105 for measurement at angle of attack (0, 3, 6, 9 &12) deg. and 3x104 for the visualization at angle of attack (12) deg. based on the airfoil chord. Results indicated that the excitation frequency and the excitation location are the key parameters to alter the flow properties and thus to improve the aerodynamic performance. The most effective excitation frequency is found to be equal to the shear layer instability frequency and on excitation location close to the separation point. Moreover, the lift is increased and drag reduced dramatically. The corresponding boundary layers are visualized to be reattached to the surface.
format	article
author	Ikhlase M.Fayed
author_facet	Ikhlase M.Fayed
author_sort	Ikhlase M.Fayed
title	Effects of internal Acoustic Excitation on the Improvementof Airfoil Performance
title_short	Effects of internal Acoustic Excitation on the Improvementof Airfoil Performance
title_full	Effects of internal Acoustic Excitation on the Improvementof Airfoil Performance
title_fullStr	Effects of internal Acoustic Excitation on the Improvementof Airfoil Performance
title_full_unstemmed	Effects of internal Acoustic Excitation on the Improvementof Airfoil Performance
title_sort	effects of internal acoustic excitation on the improvementof airfoil performance
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2007
url	https://doaj.org/article/d8b0587a497d427f9b3a7b7c8f5dae66
work_keys_str_mv	AT ikhlasemfayed effectsofinternalacousticexcitationontheimprovementofairfoilperformance
_version_	1718400381479813120

Effects of internal Acoustic Excitation on the Improvementof Airfoil Performance

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