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.
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References
Goldstein, M.E. (1983) The evolution of Tollmien–Schlichting waves near a leading edge. J. Fluid Mech. 127, 59–81.
Hammerton, P.W. & Kerschen, E.J. (1996) Boundary-layer receptivity for a parabolic leading edge. J. Fluid Mech. 310, 243–267.
Hammerton, P.W. & Kerschen, E.J. (1997) Boundary-layer receptivity for a parabolic leading edge. Part 2. The small-Strouhal number limit. J. Fluid Mech. 353 205–220.
Hammerton, P.W. & Kerschen, E.J. (1999) Leading-edge receptivity for bodies with mean aerodynamic loading. Submitted to J. Fluid Mech..
Sark, W.S., Wei, W., Rasmussen, B.K. & Krutckhoff, T.K. (1995) Experiments on leading edge receptivity to sound. AIAA 95–2253.
Haddad, O.H. & Corke, T.C. (1998) Boundary-layer receptivity to free-stream sound on parabolic bodies. J. Fluid Mech. 368, 1–26.
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© 2000 Springer-Verlag Berlin Heidelberg
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Hammerton, P.W., Kerschen, E.J. (2000). Effect of Leading-edge Geometry and Aerodynamic Loading on Receptivity to Acoustic Disturbances. In: Fasel, H.F., Saric, W.S. (eds) Laminar-Turbulent Transition. IUTAM Symposia. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-03997-7_3
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DOI: https://doi.org/10.1007/978-3-662-03997-7_3
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-08752-3
Online ISBN: 978-3-662-03997-7
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