Effects of internal Acoustic Excitation on the Improvement of 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 co...

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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/8ea9d0231a7749d9b62ba1d04aac19ab
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id	oai:doaj.org-article:8ea9d0231a7749d9b62ba1d04aac19ab
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spelling	oai:doaj.org-article:8ea9d0231a7749d9b62ba1d04aac19ab2021-12-02T02:25:31ZEffects of internal Acoustic Excitation on the Improvement of Airfoil Performance1818-11712312-0789https://doaj.org/article/8ea9d0231a7749d9b62ba1d04aac19ab2007-09-01T00:00:00Zhttp://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/633https://doaj.org/toc/1818-1171https://doaj.org/toc/2312-0789 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. 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 (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 Improvement of 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 Improvement of Airfoil Performance
title_short	Effects of internal Acoustic Excitation on the Improvement of Airfoil Performance
title_full	Effects of internal Acoustic Excitation on the Improvement of Airfoil Performance
title_fullStr	Effects of internal Acoustic Excitation on the Improvement of Airfoil Performance
title_full_unstemmed	Effects of internal Acoustic Excitation on the Improvement of Airfoil Performance
title_sort	effects of internal acoustic excitation on the improvement of airfoil performance
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2007
url	https://doaj.org/article/8ea9d0231a7749d9b62ba1d04aac19ab
work_keys_str_mv	AT ikhlasemfayed effectsofinternalacousticexcitationontheimprovementofairfoilperformance
_version_	1718402484185071616

Effects of internal Acoustic Excitation on the Improvement of Airfoil Performance

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