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Large amplitude oscillation effects on cone pitch stability in viscous hypersonic flow

Published online by Cambridge University Press:  04 July 2016

G. R. Hutt ,
R. A. East  and
R. D. Wilson
G. R. Hutt
Affiliation:
Department of AeronauticsandAstronautics University of Southampton
R. A. East
Affiliation:
Department of AeronauticsandAstronautics University of Southampton
R. D. Wilson
Affiliation:
Department of AeronauticsandAstronautics University of Southampton
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Summary

Experimental and theoretical, small and large amplitude stability data are presented for a pointed and a 0.2 bluntness ratio, 10° semi-angle cone performing pitching oscillations in hypersonic flow at a Mach number of 6.85. Analysis identifies that large amplitude model motion time histories cannot be predicted from a knowledge of small amplitude oscillation stability derivatives data. At the Reynolds numbers of the experiments the pointed and blunted cone are subject to significant hypersonic flow viscous phenomena, which are proposed as the cause of the small to large amplitude stability prediction being invalid.

Type
Research Article
Information
The Aeronautical Journal , Volume 93 , Issue 922 , February 1989 , pp. 50 - 57
Copyright
Copyright © Royal Aeronautical Society 1989 

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