Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-27T15:07:36.913Z Has data issue: false hasContentIssue false
  • English
  • Français

An experimental and computational investigation of ground effect lift loss for single jet impingement

Published online by Cambridge University Press:  04 July 2016

Dan N. Ing  and
Xin Zhang
Dan N. Ing
Affiliation:
Logico Systems
Xin Zhang
Affiliation:
University of Southampton
Get access Rights & Permissions [Opens in a new window]

Abstract

An investigation was carried out to study the parameters affecting single-jet ground-effect hover lift loss and to identify the cause(s) behind the large discrepancies in lift loss between the experiments of Wyatt of RAE Bedford and Corsiglia et alof Nasa Ames. The cause of the discrepancies was traced to a single geometrical parameter: baffle plate edge geometry, which significantly affected the flow separation underneath the plate. In contrast, the out-of-ground lift loss is insensitive to the edge geometry, but can be significantly affected by room size restriction. The investigations have highlighted the importance of accurately representing the edge geometry in ground effect testing of Vstol aircraft, and the importance of the test environment when conducting out-of-ground hover experiments.

Type
Research Article
Information
The Aeronautical Journal , Volume 98 , Issue 974 , April 1994 , pp. 127 - 136
Copyright
Copyright © Royal Aeronautical Society 1994 

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. Wyatt, L.A., Tests on the loss of vertical jet thrust due to ground effect on two simple VTOL platforms, with particular reference to the Short SCI aircraft, RAE, Report No. Aero. 2607, 1958.Google Scholar
2. Corsiglia, V.R.,Wardwell, D.A., and Kuhn, R.E., Small-scale experiments in Stovl ground effects, in: Proceedings of the International Powered Lift Conference, RAeS, London, August 1990, paper No. 14.Google Scholar
3. Spreemann, K.P. and Sherman, I.R., Effects of ground proximity on the thrust of a simple downward-directed jet beneath a flat surface, NASA TN 4407, 1958.Google Scholar
4. Davenport, E.E. and Spreemann, K.P., Thrust characteristics of multiple lifting jets in ground proximity, NASA TN D-513, 1960.Google Scholar
5. Gentry, G.L. and Margason, R.J., Jet-induced lift losses on Vtol configurations hovering in and out of ground effect, NASA TN D-3166, February 1966.Google Scholar
6. Hall, G.R., Scaling of Vtol aerodynamic suckdown forces, Journal of Aircraft, 4, (4), July-August 1967, pp393–394.Google Scholar
7. Christiansen, R.S., A large scale investigation of Vstol ground effects, AIAA Paper 84-0336, January 1984.Google Scholar
8. Ing, D.N. and Bailey, P., Correlation between Wyatt and other studies on single jet in-ground-effect lift loss, Logico Systems,Report No. 24/91, January 1991.Google Scholar
9. Zhang, X. and Ing, D.N., A study of single jet impingement ground effect lift loss, AIAA paper 93-0869, January 1993.Google Scholar
10. Ing, D.N., An experimental investigation of single jet impingement ground-effect lift loss — the “Wyatt Anomaly”, Logico Systems, Report No. 28/93, June 1993.Google Scholar
11. Mayson, I., Ogilvie, F.B., and Harris, K.D., An investigation under static external flow conditions of the axial force induced on circular flat plates surrounding simple uniform and co-axial jets exhausting normally to the plates, Hawker Siddeley Aviation Research/1010/IM/FBO/KDH, December 1971.Google Scholar
12. Ing, D.N., Effects of nozzle pressure on free jet entrainment, BAe Kingston, BAe-KAD-R-RES-3100, February 1985.Google Scholar
13. Ing, D.N. and Harris, A.E. Ground Environment mat (GEM) on Astovl ground-effect performance, AIAA Paper 93-4891, the Inter national Powered Lift Conference, Santa Clara, California, USA, December 1993.Google Scholar