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The effect of freestream turbulence on pressure fluctuations in transonic flow

Published online by Cambridge University Press:  04 July 2016

S. Raghunathan  and
R.J.W. McAdam
S. Raghunathan
Affiliation:
Department of Aeronautical Engineering, The Queens’s University of Belfast
R.J.W. McAdam
Affiliation:
Short Brothers Ltd, Belfast
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Abstract

Pressure fluctuation measurements were made on an 18% thick biconvex aerofoil in the region of shock boundary layer interaction at various levels of free stream flow unsteadiness. Experiments were performed with free transition and transition fixed models at a shock Mach number of 1.44 and blade chord Reynolds number of 1.6 x 105. The transition free model with a laminar boundary layer showed the presence of periodic flows at low turbulence levels which disappeared with the increase in turbulence levels. The general effect of free stream turbulence on transition fixed model is one of broad band amplification of pressure fluctuation levels in the region of shock interactions.

Type
Research Article
Information
The Aeronautical Journal , Volume 89 , Issue 883 , March 1985 , pp. 87 - 92
Copyright
Copyright © Royal Aeronautical Society 1985 

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