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Experimental and computational study of unsteady hypersonic cavity flows

Published online by Cambridge University Press:  03 February 2016

S. Creighton  and
R. Hillier
S. Creighton
Affiliation:
Department of Aeronautics, Imperial College, London, UK
R. Hillier
Affiliation:
Department of Aeronautics, Imperial College, London, UK
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Abstract

This paper presents a combined experimental and computational study of annular cavities on a semi-angle cone in a Mach 8·9 flow. A range of cavity length-to-depth ratios has been considered, and a parameter has been determined that distinguishes between ‘weak oscillations’ and ‘strong oscillations’ of the cavity flow. Essentially the work identifies the transition from the case where the flow can be regarded as ‘pure cavity flow’ to that where the flow behaviour is tending towards that of a ‘spiked blunt body’. The CFD simulations also suggest that, for a certain range of cavity scale, the limiting cavity flow state depends upon the flow initialisation process; it may be weak or strongly oscillating.

Type
Research Article
Information
The Aeronautical Journal , Volume 111 , Issue 1125 , November 2007 , pp. 673 - 688
Copyright
Copyright © Royal Aeronautical Society 2007 

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