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The influence of relaxation on shock detachment

Published online by Cambridge University Press:  19 April 2006

H. G. Hornung  and
G. H. Smith
H. G. Hornung
Affiliation:
Department of Physics, Australian National University, Canberra, Australia
G. H. Smith
Affiliation:
Department of Physics, Australian National University, Canberra, Australia
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Abstract

By establishing that the length scale governing the detachment of a shock wave from a wedge is the distance from the leading edge to the sonic line, and by considering the view of observers with different length scales, it is predicted that the detachment distance increases gradually with wedge angle for relaxing flow and more rapidly in a perfect gas. Both of these features are confirmed by experiments in the free-piston shock tunnel. The influence of other length scales is discussed. The phenomenon is related to a relaxation effect in which a subsonic layer grows from the translational-rotational shock as the wedge inclination is increased beyond the frozen sonic point.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 93 , Issue 2 , 26 July 1979 , pp. 225 - 239
Copyright
© 1979 Cambridge University Press

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References

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