Hostname: page-component-848d4c4894-p2v8j Total loading time: 0.001 Render date: 2024-05-17T00:07:24.048Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access Rights & Permissions [Opens in a new window]

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 

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

1. Timme, A. ‘Effect of turbulence and noise on wind tunnel measurements at transonic speeds’, AGARD-R-602, Paper 5, 1973.Google Scholar
2. Mabey, D. G. ‘Flow unsteadiness and model vibration in wind tunnels at subsonic and transonic speeds’, ARC CP 1165, 1971.Google Scholar
3. Raghunathan, S., Coll, J. B. and Mabey, D. G. ‘Flat plate turbulent boundary layers subject to large pressure fluctuations’, AIAA Journal, January 1979, 17, 1 ,105–107.Google Scholar
4. Raghunathan, S., Coll, J. B. and Mabey, D. G. ‘Transonic shock/boundary layer interaction subjected to large pressure fluctuations’, AIAA Journal, December 1979, 17, 12, 1404–1406.Google Scholar
5. Weeks, D. J. and Hodges, J. ‘An experimental investigation into the influence of acoustic disturbances on the development of a turbulent boundary layer’, RAE TR 77035, 1977.Google Scholar
6. Raghunathan, S. and Mcadam, R. J. W. ‘Free stream turbulence effects on attached subsonic turbulent boundary layer’, AIAA Journal, April 1983, 21, 4, 503–508.Google Scholar
7. Raghunathan, S. and McAdam, R. J. W. “The relative effects of Reynolds Number and turbulence in transonic flow’, AIAA 16th Fluid and Plasma Dynamics Conference, July 1983, Paper 83-1726Google Scholar
8. Bradshaw, P. ‘Effect of free stream turbulence on turbulent shear layers’, Imperial College Aero. Report 74-10, 1974.Google Scholar
9. Ross, W. C and McDaid, E. P. ‘Turbulence measurements in transonic flow’, AIAA Journal, September 1977, 15, 9, 1368–1379.Google Scholar
10. Lowson, M. V. ‘Pressure fluctuations in turbulent boundary layers’, NASA TND-3156, December 1965.Google Scholar
11. Fricke, F. R. ‘Pressure fluctuations in separated flows’, Journal of Sound and Vibration’, 1971, 17, 113–123.Google Scholar
12. Kestin, J. ‘The effect of free stream turbulence on heat transfer rates’, Journal of Advances in Heat Transfer, 1966, 3, 1–32.Google Scholar
13. Lambourne, N. C. ‘Some instabilities arising from the interaction between shock waves and boundary layers’, ARC CP No 473, 1960.Google Scholar
14. Finke, K. ‘Shock oscillations in transonic flow’, VDI Forshungsheft, 280, 1977.Google Scholar
15. Mabey, D. G., Welsh, B. L. and Cripps, B. E. ‘Periodic flows on a rigid 14% thick biconvex wing at transonic speeds’, RAE TR 81059,1981.Google Scholar