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Experimental study of overexpanded supersonic jet impingement on a double wedge deflector

Published online by Cambridge University Press:  04 July 2016

J.K. Prasad ,
R.C. Mehta  and
A.K. Sreekanth
J.K. Prasad
Affiliation:
Vikram Sarabhai Space Centre, Trivandrum, India
R.C. Mehta
Affiliation:
Vikram Sarabhai Space Centre, Trivandrum, India
A.K. Sreekanth
Affiliation:
Indian Institute of Technology, Madras, India
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Abstract

Experiments have been conducted to study the impingement fiowfield, over a double wedge deflector, produced by the impingement of an overexpanded supersonic jet. The jet has an exit Mach number of 3.1 and an expansion ratio of 0.81. The distance between the nozzle exit and deflector apex was varied from 2 to 5 times the nozzle exit diameter. The experiment consisted of schlieren flow visualisations and measurements of pressure distribution. Load coefficient has been obtained by integrating the measured pressure distributions. Boundary layer thickness and skin friction coefficient on the deflector surface have been calculated by solving compressible turbulent boundary layer equations, using moment integral and moment-of-momentum integral equations in conjunction with the measured surface pressure distributions.

Type
Research Article
Information
The Aeronautical Journal , Volume 97 , Issue 966 , July 1993 , pp. 209 - 214
Copyright
Copyright © Royal Aeronautical Society 1993 

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References

1. Lamont, P.J. and Hunt, B.L. The impingement of underexpanded axisymmetric jets on perpendicular and inclined flat plate, J Fluid Mech, 1980,100, (3), pp 471–511.Google Scholar
2. Donaldson, CD. and Snedeker, R.S. A study of free jet impingement, J. Fluid Mech, 1971, 45, (2), pp 281–324,Google Scholar
3. Belov, I.A., Ginzburg, I.P. and Shub, L.I. Supersonic underexpanded jet impingement upon flat plate, Int J Heat Mass Trans, 1973, 16, pp. 2067–2076.Google Scholar
4. Lamont, P.J. and Hunt, B.L. The impingement of underexpanded axisymmetric jets on wedges, J Fluid Mech, 1976, 76, pp 307–336.Google Scholar
5. Hunt, B.L. Load and pressures due to underexpanded jets impinging on wedges, Aeronaut Q, May 1983, pp 76–98.Google Scholar
6. Chow, W.L. and Chang, I.S. Mach reflection associated with over-expanded nozzle free jet flows, AIAA J, June 1975, 3, pp 762–766.Google Scholar
7. Chang, I.S. Mach Reflections, Mach Disc and the Associated Nozzle Free Jet Flows, PhD Thesis. Dept of Mechanical Engineering, University of Illinois, 1973.Google Scholar
8. Chow, W.L. and Chang, I.S. Mach reflections from overexpanded nozzle flows, AIAA J, 1972, 10, pp 1261–1263.Google Scholar
9. Carling, J.C. and Hunt, B.L. The near wall jet of a normally impinging uniform axisymmetric supersonic jet, J Fluid Mech, 1974, 66, pp 159–176.Google Scholar
10. Sasman, P.K. and Cresci, R.L. Compressible turbulent boundary layer with pressure gradient and heat transfer, AIAA J, January 1966, 4, pp 19–25.Google Scholar