Hostname: page-component-8448b6f56d-dnltx Total loading time: 0 Render date: 2024-04-23T18:26:42.355Z Has data issue: false hasContentIssue false
  • English
  • Français

The impingement of underexpanded, axisymmetric jets on perpendicular and inclined flat plates

Published online by Cambridge University Press:  19 April 2006

P. J. Lamont  and
B. L. Hunt
P. J. Lamont
Affiliation:
Department of Aeronautical Engineering, University of Bristol, England Present address: Department of Fluid Mechanics, University of Manchester, England.
B. L. Hunt
Affiliation:
Department of Aeronautical Engineering, University of Bristol, England Present address: Northrop Corporation, 3901 West Broadway, Hawthorne, California, U.S.A.
Get access Rights & Permissions [Opens in a new window]

Abstract

This paper reports on an extensive experimental study of the flows due to under-expanded axisymmetric jets impinging on flat plates. The range of plate locations extends to a point where the jet is just subsonic but the main emphasis is on the behaviour in the first shock cell. Plate inclinations from 90° to 30° were investigated by means of comprehensive surface pressure measurements and shadowgraph pictures. Wherever possible, the main features of the results have been reconstructed using inviscid analyses of the wave interactions.

The flows are shown to be extremely complex due to the local structure of the free jet and, particularly, due to interactions between shock waves in the free jet and those created by the plate. In the near field, these interactions tend to be the controlling factors but at larger distances from the nozzle, mixing effects become increasingly important.

The maximum pressure on the plate when it is inclined can be very much larger than when the plate is perpendicular, owing to the possibility of high pressure recoveries through multiple shock systems. Correlations are presented for some of the main features on perpendicular plates and it is shown that the integrated pressure loads for both normal and inclined plates can be predicted well by a simple momentum balance.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 100 , Issue 3 , 16 October 1980 , pp. 471 - 511
Copyright
© 1980 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Back, L. H. & Cuffel, R. F. 1966 A.I.A.A. J. 4, 2219.
Back, L. H. & Sarohia, V. 1978 A.I.A.A. J. 16, 634.
Butler, H. W. 1966 N.A.S.A. Contractors Rep. CR-81143.
Carling, J. C. & Hunt, B. L. 1974 J. Fluid Mech. 66, 159.
Clark, L. V. 1970 N.A.S.A. Tech. Note D-5895.
Donaldson, C. DuP. & Snedeker, R. S. 1971 J. Fluid Mech. 45, 281.
Edney, B. 1968 Aero. Res. Inst. Sweden FFA Rep. no. 115.
Ginzburg, I. P., Belov, I. A., Zazimko, V. A. & Terpigor'ev, V. S. 1968 Heat & Mass Transfer (Minsk) 1, 381.
Ginzburg, I. P., Semiletenko, B. G., Terpigor'ev, V. S. & Uskov, V. N. 1970 J. Engng Phys. U.S.S.R. 19, 412.
Gubanova, O. I., Lunev, V. V. & Plastinina, L. I. 1974 Fluid Dyn. 6, 135.
Gummer, J. H. & Hunt, B. L. 1971 Aero. Quart. 22, 403.
Gummer, J. H. & Hunt, B. L. 1974 Israel J. Tech. 12, 221.
Henderson, L. F. 1964 Aero. Quart. 15, 181.
Henderson, L. F. 1966 Z. angew. Math. Phys. 17, 553.
Hunt, B. L. & Lamont, P. J. 1978 Aero. Quart. 29, 18.
Kalghatgi, G. T. & Hunt, B. L. 1976 Aero. Quart. 27, 169.
Lamont, P. J. & Hunt, B. L. 1976 J. Fluid Mech. 76, 307.
Lamont, P. J. & Hunt, B. L. 1977 University of Bristol, Aero. Dept. Rep. PJL/7701, BLH/7703 (2 vols).
Nakatogawa, T., Hirat, M. & Kukita, Y. 1971 J. Spacecraft 8, 410.
Prozan, R. J. 1966 Lockheed Missiles and Space Company Rep. LMSC/HREC A 78235-A.
Sauer, R. 1947 N.A.C.A. Tech. Memo. 1047.
Semiletenko, B. G. & Uskov, V. N. 1972 J. Engng Phys. U.S.S.R. 23, 453.
Snedeker, R. S. & Donaldson, C. DuP. 1964 Aero. Res. Ass. Princeton Rep. no. 63.
Snedeker, R. S. & Donaldson, C. DuP. 1965 Aero. Res. Ass. Princeton Rep. no. 64.