Effect of leading-edge geometry and aerodynamic loading on receptivity to acoustic disturbances.

Hammerton, P. W. and Kerschen, E. J. (2000) Effect of leading-edge geometry and aerodynamic loading on receptivity to acoustic disturbances. Proceedings of Fourth I.U.T.A.M. Symposium on Transition. pp. 37-42.

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Abstract

A theoretical analysis is presented for the effects of the nose radius and aerodynamic loading of a body on leading-edge receptivity. We consider linear, time-harmonic disturbances to a two-dimensional, low Mach number flow past a cambered airfoil with parabolic leading edge. Asymptotic methods based on large Reynolds number are used, supplemented by numerical results. The body nose radius enters the theory through a Strouhal number S, and the mean aerodynamic loading enters the theory through a leading-edge loading parameter μ. For most values of μ, the receptivity level decreases with increasing S. At fixed S, the introduction of modest aerodynamic loading produces a reduction in receptivity, but as the loading is increased towards the point at which the mean boundary-layer flow separates, a marked increase in receptivity coefficient is observed. Obliquely incident acoustic waves are found to produce much higher receptivity levels than parallel waves.

Item Type:	Article
Faculty \ School:	Faculty of Science > School of Mathematics
UEA Research Groups:	Faculty of Science > Research Groups > Fluid and Solid Mechanics
Depositing User:	Vishal Gautam
Date Deposited:	12 Sep 2011 10:56
Last Modified:	18 Jun 2024 14:30
URI:	https://ueaeprints.uea.ac.uk/id/eprint/26743
DOI:	10.1007/978-3-662-03997-7_3

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