Hostname: page-component-848d4c4894-mwx4w Total loading time: 0 Render date: 2024-07-01T08:17:49.385Z Has data issue: false hasContentIssue false
  • English
  • Français

Wide angle diffusers with passive boundary-layer control

Published online by Cambridge University Press:  04 July 2016

S. Raghunathan ,
T. Mcllwain  and
D. G. Mabey
S. Raghunathan
Affiliation:
The Queen’s University of Belfast
T. Mcllwain
Affiliation:
The Queen’s University of Belfast
D. G. Mabey
Affiliation:
Royal Aerospace Establishment, Bedford
Get access Rights & Permissions [Opens in a new window]

Abstract

Experiments were made on a two-dimensional low speed diffuser with passive control. The passive control consisted of porous surfaces made of holes/slots connected by a breather passage. Passive control postpones the stall and reduces buffet levels in the diffuser. This test confirms that passive controls to prevent flow separation are not restricted to transonic speeds.

Type
Research Article
Information
The Aeronautical Journal , Volume 95 , Issue 941 , January 1991 , pp. 28 - 34
Copyright
Copyright © Royal Aeronautical Society 1991 

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. Kline, S. J., Abbot, D. E. and Fox, R. W. Optimum design of straight walled diffusers. ASME J Basic Eng, 1959, 81, pp 321–331.Google Scholar
2. Kline, S. J. On the nature of stall. ASME J Basic Eng, 1959, 81, p 305.Google Scholar
3. Waitman, B. A., Reneau, L. B. and Kline, S. J. Effect of inlet conditions on the performance diffusers. J Basic Eng, ASME, 1961, 83.Google Scholar
4. Hoffmann, J. A. Effects of free stream turbulence on diffuser performance. J Fluids Eng, September 1981, 103.Google Scholar
5. Furaya, Y., Fujimoto, T. and Yamazto, E. Performance of two-dimensional diffusers with suction at entrance. Bull JSME, 1970, 13, (56).Google Scholar
6. Cochran, D. L. and Kline, S. J. The Use of Short Flat Vanes for Producing Efficient Wide Angle Two-Dimensional Subsonic Diffusers. NACA TN4309, September 1958.Google Scholar
7. Carlson, J. J., Johnston, J. P. and Sagi, C. J. Effects of wall shape on flow regimes and performance in straight two-dimensional diffusers, J Basic Eng, March 1967.Google Scholar
8. Valentine, E. F. and Carroll, R. B. Effects of Several Arrangements of Rectangular Vortex Generators on the Static Pressure Rise Through a Short 2:1 Diffuser. NACA RM L50L04, 1951.Google Scholar
9. Wood, C. C. Preliminary Investigation of the Effects of Rectangular Vortex Generators on the Performance of a Short 1.9:1 Straight Wall Annular Diffuser. NACA RM L51G09, 1951.Google Scholar
10. Senoo, Y. and Nishi, M. Improvements of the performance of conical diffusers by vortex generators. J Fluid Eng, March 1974, 96, Part 4.Google Scholar
11. Holzhauser, C. A. and Hall, L. P. Explanatory Investigation of the Use of Area Suction to Eliminate Air Flow Separation in Diffusers Having Large Expansion Angles. NACA TN 3793, October 1956.Google Scholar
12. Sarjben, M., Chen, C. P. and Krouttl, J. C. A new passive boundary-layer control device, J Aircr, 14, (7).Google Scholar
13. Rao, R. S. S., Vyas, B. D. and Raghunathan, S. Effect of inlet circulation on the performance of straight conical diffusers. Ind J Tech, 1971, 9, (4), pp 135–137.Google Scholar
14. Bahi, L., Ross, J. M. and Nagamatsu, H. T. Passive shock wave/boundary-layer control for transonic aerofoil drag reduction. AIAA 21st Aerospace Science Meeting, Reno, January 1983. Paper 83-0137.Google Scholar
15. Raghunathan, S. and Mabey, D. G. Buffet breathers for aerofoils. UK Patent No. 8600175, 1986.Google Scholar
16. Krogmann, P., Stanewsky, E. and Theide, P. Effect of suction on shock/boundary-layer interaction and shock induced separation. J Aircr, 1985, 22, (1), pp 37–42.Google Scholar
17. Renau, L. R., Johnston, J. P. and Kline, S. T. Performance and design of straight two-dimensional diffusers. ASME J Basic Eng, 1967, 89, pp 141–150.Google Scholar
18. Reid, E. G. Performance Characteristics of Plane Wall Two-Dimensional Diffusers. NACA TN 2888, 1953.Google Scholar
19. Mabey, D. G. Prediction of Severity of Buffeting. AGARD-LS-94, 1978, pp 7–1 to 7–30.Google Scholar
20. Mabey, D. G. Some Aspects of Aircraft Dynamic Loads due to Flow Separation. AGARD R750, 1987.Google Scholar
21. Smith, C. R. and Layne, J. L. An experimental investigation of flow unsteadiness generated by transitory stall in plane wall diffuser. J Fluids Eng, 1979, 101, p 181.Google Scholar
22. Phanton, R. L. Effect of orifice geometry on Helmholtz resonator excitation by grazing flow. AIAA J, 1990, 28, (1), pp 60–65.Google Scholar