Hypersonic flow over concave surfaces with leading-edge bluntness

Murthy, AV (1975) Hypersonic flow over concave surfaces with leading-edge bluntness. AIAA Journal, 13 (9). pp. 1230-1233. ISSN 0001-1452

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Both Cheng's theory and its modified version using tangent wedge rule are studied for power-law concave surface flows with leading-edge bluntness. It is shown that Cheng's theory yields highly oscillatory results for concave surfaces with blunt leading edge. The tangent wedge analysis is found to predict a smooth transition from the leading-edge blast wave effect to the downstream asymptotic conditions. The alternative use of the tangent wedge formula cannot be justified strictly from theoretical considerations, since it neglects the centrifugal pressure rise on the surface. The good agreement with experimental results obtained for concave surfaces with sharp leading edge using the tangent wedge formula suggests that the analysis presented may be useful in making first estimates, since the effects of the nose bluntness and the boundary-layer displacement are13; similar.13;

Item Type: Article
Additional Information: Copyright for this article belongs to AIAA
Uncontrolled Keywords: Blunt bodies;Concavity;Hypersonic flow;Leading edges; Afterbodies;Free flow;Numerical analysis;Pressure distribution;Pressure effects;Surface layers;Wedge flow
Subjects: AERONAUTICS > Aerodynamics
Depositing User: Ms. Alphones Mary
Date Deposited: 18 Mar 2010
Last Modified: 24 May 2010 04:09
URI: http://nal-ir.nal.res.in/id/eprint/945

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