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A numerical study of the application of vane and air-jet vortex generators

Published online by Cambridge University Press:  04 July 2016

C. Küpper  and
F. S. Henry
C. Küpper
Affiliation:
Department of Aeronautical, Civil and Mechanical Engineering City University, London, UK Department of Meteorology, University of Reading, Reading, UK
F. S. Henry
Affiliation:
Department of Aeronautical, Civil and Mechanical Engineering City University, London, UK
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Abstract

The objective of the work described in this paper was to identify differences in the flow fields immediately downstream of air-jet and vane vortex generators. The flows were assumed to be incompressible and fully turbulent and were solved using the finite volume, Navier-Stokes code CFX 4 (CFDS, AEA Technology, Harwell) on a non-orthogonal, body-fitted grid using the k-ε turbulence model and standard wall functions. The behaviour of the longitudinal vortices produced by the vanes and air jets is presented in terms of stream-wise and cross-stream velocity profiles, circulation and peak vorticity decay, peak vorticity paths in the cross-stream and streamwise direction, cross-stream vorticity profiles, and cross-stream distribution of shear stress. The predicted results show that the vanes and air jets considered produce vortices with significantly different circulation strengths, but that the enhancement of skin friction was of similar magnitude in both cases.

Type
Research Article
Information
The Aeronautical Journal , Volume 105 , Issue 1047 , April 2001 , pp. 255 - 265
Copyright
Copyright © Royal Aeronautical Society 2002 

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References

1. Taylor, H.D. Application of vortex generator mixing principles to diffusers, December 1948, Concluding Report R-–5064-5, United Aircraft Research Department.Google Scholar
2. Wallis, R.A. The use of air-jets for boundary layer control, 1952, Aeronautical Research Council, Australia, Aero Note 110.Google Scholar
3. Wallis, R.A. A preliminary note on a modified type of air-jet for boundarylayercontrol, 1960, AeronauticalResearchCouncil, Australia, Current-Paper CP 513.Google Scholar
4. Pearcey, H.H. Shock Induced Separation and its Prevention, Boundary Layer and Flow Control, Vol 2, 1961, Pergamon, New York, pp 1170–1344,Google Scholar
5. Westphal, R.V, Eaton, J.K. and Pauley, W.R. Interaction between a vortex and a turbulent boundary layer in a streamwise pressure gradient, Turbulent Shear Flows, 1987, Durst, F.,Launder, B.E., Schmidt, F.W. and Whitelaw, J.W. (Eds), Springer Verlag, New York, pp 266–277,Google Scholar
6. Pauley, W.R. and Eaton, J.K., Experimental study of the development of longitudinal vortex pairs embedded in a turbulent boundary layer, AIAA J, July 1988,26, (7), pp 816–823.Google Scholar
7. ESDU, Vortex generators for control of shock-induced separation, part 1: introduction and aerodynamics, February 1995, ESDU Transonic Data Memorandum, No 93024.Google Scholar
8. ESDU, Vortex generators for control of shock-induced separation, Part 2: guide to use. of vane vortex generators, February 1994, ESDU Transonic Data Memorandum, No 93025.Google Scholar
9. Liandrat, J., Aupoix, B. and Couseds, J., Calculation of longitudinal vortices imbedded in a turbulent boundary layer, Turbulent Shear Flows 5, 1987, Springer-Verlag, Berlin Heidelberg.Google Scholar
10. Johnston, J.P. and Nishi, M., Vortex generator jets-means for flow separation control, AIAA J, 1990, 28, (6), pp 989–994.Google Scholar
11. Compton, D.A. and Johnston, J.P. Streamwise vortex production by pitched and skewed jets in a turbulent boundary layer, AIAA J March 1992,30, (3), pp 640–647.Google Scholar
12. Zhang, X. Computational analysis of co- and contra- rotating stream-wise vortices in a turbulent boundary layer, AIAA Paper No 93-3035, July 1993aGoogle Scholar
13. Zhang, X. Interaction between a turbulent boundary layer and elliptic and rectangular jets, 2nd International Symposium on Engineering Turbulence Modelling and Measurements, pp 251-260, Florence, Italy, May-June 1993b.Google Scholar
14. Henry, F.S. and Pearcey, H.H. Numerical model of boundary-layer control using air-jet generated vortices, AIAA J, 1994, 32, (12), pp 2415–2425.Google Scholar
15. Akanni, S.D. and Henry, F.S. Numerical calculations for air jet vortex generators in turbulent boundary layers, CEAS European Forum on High Lift and Separation Control, March 1995, Bath, UK.Google Scholar
16. Gibb, J. and Anderson, B.H., Vortex flow control applied to aircraft intake ducts, CEAS European Forum on High Lift and Separation Control, March 1995, Bath, UK.Google Scholar
17. Schlichting, H. Boundary Layer Theory, 7th ed, 1979, McGraw Hill.Google Scholar
18. Hinze, J.O. Turbulence, 1959, McGraw Hill.Google Scholar
19. Rodi, W. Turbulence Models and Their Application in Hydraulics, 1980, Institut fur Hydromechanik, Uni Karlsruhe.Google Scholar
20. CFX 4 User Manual, CFX 4 Release 4.1, October 1995, CFDS, AEA Industrial Technology Harwell Lab., Oxfordshire, UK.Google Scholar
21. Küpper, C. A Study of the Application of Air-jet Vortex Generators to Intake Ducts, 1999, PhD Thesis, City University.Google Scholar
22. Küpper, C. and Henry, F.S. Numerical study of air-jet vortex generators in a turbulent boundary layer, submitted to Aeronaut J. Google Scholar
23. Anderson, D.A., Tannehill, J.C. and Pletcher, R.H., Computational Fluid Mechanics and Heat Transfer, 1984, McGraw Hill.Google Scholar
24. Piomelli, U., Introduction to the modelling of turbulence, lecture series 1997-03, von Karman Institute for Fluid Dynamics, March 1997.Google Scholar
25. Freestone, M.M. Inviscid theory applied to vortex-induced mixing, CEAS European Forum on High Lift and Separation Control, March 1995, Bath, UK.Google Scholar