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Passive control of surface pressure fluctuations in reattaching flows

Published online by Cambridge University Press:  04 July 2016

R. Kumar  and
P. R. Viswanath
R. Kumar
Affiliation:
National Aerospace Laboratories, Bangalore, India
P. R. Viswanath
Affiliation:
National Aerospace Laboratories, Bangalore, India
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Abstract

Experiments assessing the effectiveness of passive control involving a porous surface and cavity underneath for reducing the level of surface pressure fluctuations in reattaching flows are reported. Measurements are made on a generic axisymmetric body, representative of a launch vehicle configuration, in the Mach number range of 0·8 to 1·2. The measurements consist of distributions of mean surface pressure and unsteady surface pressure fluctuations in the boat-tail separated region. The passive control significantly reduces the peak surface pressure fluctuations in the reattachment zone, even in the absence of a strong shock wave. The spectra of pressure fluctuations reveal that with passive control the energy is appreciably reduced over a wide range of frequencies.

Type
Research Article
Information
The Aeronautical Journal , Volume 106 , Issue 1066 , December 2002 , pp. 669 - 674
Copyright
Copyright © Royal Aeronautical Society 2002 

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