Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-25T06:42:15.617Z Has data issue: false hasContentIssue false
  • English
  • Français

A note on the pressure drag of a forward-swept-wing-plate junction

Published online by Cambridge University Press:  04 July 2016

A. D. Arnott ,
L. Bernstein  and
D. G. Petty
A. D. Arnott
Affiliation:
Department of Engineering Queen Mary & Westfield College University of London UK
L. Bernstein
Affiliation:
Department of Engineering Queen Mary & Westfield College University of London UK
D. G. Petty
Affiliation:
Department of Engineering Queen Mary & Westfield College University of London UK
Get access Rights & Permissions [Opens in a new window]

Summary

The forces due to normal pressure have been measured in the region of the junction between a rear-loaded wing swept forward at 28°, and a flat plate on which a turbulent boundary layer had developed. The Reynolds number was 1·03 × 106, based on the streamwise wing-chord of 500 mm. At low incidences, 0° < α ≤ 6°, the local pressure drag coefficients were found to be negativeaway from the junction, and the interaction with the junction was found to be favourable;that is the pressure drag coefficient became more negative as the junction was approached. At α = −3° the pressure drag coefficient changed from a positive value away from the junction to a negative value close to the plate. These results contrast with those for a swept-back wing-plate interaction, which has been reported as being unfavourable so far as the pressure drag was concerned. At 6° incidence, the interaction remained favourable but there was evidence of root stall beginning. At an incidence of 9°, root stall was much more marked and the positive pressure drag coefficient increased as the junction was approached.

Type
Research Article
Information
The Aeronautical Journal , Volume 100 , Issue 997 , September 1996 , pp. 281 - 284
Copyright
Copyright © Royal Aeronautical Society 1996 

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.)

Footnotes

†

Currently at the Department of Physics and Astronomy, University of Edinburgh, UK.

References

1. Baker, C.J. The laminar horse-shoe vortex, J Fl Mech, 1979, 95, pp 347–367,Google Scholar
2. Baker, C.J. The turbulent horse-shoe vortex, J Wind Eng & Ind Aero, 1980, 6, pp 9–23.Google Scholar
3. Baker, C.J. The position of points of maximum and minimum shear stress upstream of cylinders mounted normal to flat plates, J Wind Eng & Ind Aero, 1985,18, pp 263–274.Google Scholar
4. Kubendran, L.R., Bar-Sever, A. and Harvey, W.D. Flow control in a wing/fuselage type juncture, AIAA Paper 88-0614, 1988.Google Scholar
5. Kubendran, L.R., Mcmahon, H.M. and Hubbartt, J.E., Interfer ence drag in a simulated wing-fuselage juncture, NASA CR 3811, 1984.Google Scholar
6. Kubendran, L.R., Mcmahon, H.M. and Hubbartt, J.E., Turbulent flow around a wing/fuselage type juncture, AIAA J, 1986, 24, pp 1447–1452.Google Scholar
7. Mcmahon, H., Hubbartt, J. and Kubendran, L.R. Mean velocities and Reynolds stresses in a juncture flow, NASA CR 3605, 1982.Google Scholar
8. Mcmahon, H., Hubbartt, J. and Kubendran, L.R. Mean velocities and Reynolds stresses upstream of a simulated wing-fuselage junc ture, NASA CR 3695, 1983.Google Scholar
9. Mehta, R.D. Effect of wing-nose shape on the flow in a wing-body junction, Aeronaut J 1984, 88, pp 456-460.Google Scholar
10. Devenport, W.J., Agarwal, N.K., Dewitz, M.B., Simpson, R.L. and Podder, K. Effects of a fillet on the flow past a wing-body junction, AIAA J, 1990, 28, pp 2017–2024.Google Scholar
11. Devenport, W.J. and Simpson, R.L. Some time-dependent features of turbulent appendage-body juncture flows, 16th Symp. on Naval hydrodynamics, Berkeley, Cal., 1986.Google Scholar
12. Devenport, W.J. and Simpson, R.L. Turbulence structure near the nose of a wing-body junction. AIAA Paper 87-1310, 1987.Google Scholar
13. Devenport, W.J. and Simpson, R.L. LDV measurements in the flow past a wing-body junction. IVth Int Symp on Applications of Laser Anemometry to Fluid Mech, Lisbon, 1988.Google Scholar
14. Devenport, W.J. and Simpson, R.L. Time-dependent structure in wing-body junction flows. Turbulent Shear Flows VI, pp 232-248. Springer-Verlag, 1989.Google Scholar
15. Devenport, W.J. and Simpson, R.L. Time-dependent and time-aver aged turbulence structure near the nose of a wing-body junction. J Fl Mech, 1990, 210, pp 23–55.Google Scholar
16. Devenport, W.J. & Simpson, R.L. The flow past a wing-body junc tion - an experimental evaluation of turbulence models. AIAA J, 1992, 30, pp 873–881.Google Scholar
17. Devenport, W.J., Simpson, R.L., Dewitz, M.B. & Agarwal, N.K. Effects of a leading-edge fillet on the flow past an appendage-body junction. AIAA J, 1992, 30, pp 2177-2183. (Revision of AIAA Paper 91-0252.)Google Scholar
18. Gough, M.L. The effect of fillets between wings and fuselages on the drag and propulsion efficiency of an airplane. NACA TN 299, 1928.Google Scholar
19. Gersten, K. Corner interference effects, AGARD Report 299, 1959.Google Scholar
20. Bernstein, L. and Hamid, S. On the effect of a swept-wing/plate junction flow on the lift and drag. Aeronaut J, 1995, 99, pp 293–305.Google Scholar
21. Bernstein, L. and Hamid, S. On the effect of a strake-like junction fillet on the lift and drag of a wing, Aeronaut J, 1996,100, pp 39–52.Google Scholar
22. Uhuad, G.C., Weeks, T.M. and Large, R. Wind tunnel investigation of the transonic characteristics of swept-forward wings. J Aircr, 1983, 20, pp 195–202.Google Scholar
23. Redecker, G. and Wichmann, G. Forward sweep — a favourable concept for a laminar flow wing. J Aircr, 1991, 28, pp 97–103.Google Scholar