Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-05T07:57:05.479Z Has data issue: false hasContentIssue false
  • English
  • Français

Optimisation of air-jet vortex generators with respect to system design parameters

Published online by Cambridge University Press:  04 July 2016

T. P. Bray  and
K. P. Garry
T. P. Bray
Affiliation:
College of AeronauticsCranfield University, UK
K. P. Garry
Affiliation:
College of AeronauticsCranfield University, UK
Get access Rights & Permissions [Opens in a new window]

Abstract

A simple technique is proposed that allows the definition of the geometry and characteristics of an air-jet vortex generator to be defined, using the system requirements in practical design. Typically, the aircraft designer is concerned with the mass flow-rate and air pressure requirements of any pneumatic system for inclusion to an airframe. These parameters are not congruent with those for air-jet vortex generator aerodynamic design, and therefore, some tool is required to bridge the gap.

Such a tool is proposed, based on empirical methods for the prediction of air-jet vortex generator behaviour. The technique allows the comparison of the vortex strength, and the system inputs (the jet mass flow-rate and the air-jet plenum pressure) for the air-jet, for a range of jet nozzle diameters and jet velocity ratios. Through this comparison, the optimum air-jet design can be reached for a given system input.

Type
Research Article
Information
The Aeronautical Journal , Volume 103 , Issue 1028 , October 1999 , pp. 475 - 480
Copyright
Copyright © Royal Aeronautical Society 1999 

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. Wallis, R.A. A preliminary note on a modified type of air-jet for boundary-layer control. ARC CP (513), 1960.Google Scholar
2. Compton, D.A. and Johnston, J.P. streamwise vortex production by pitched and skewed jets in a turbulent boundary-layer. AIAA Paper 91- 0038. 29th Aerospace Sciences Meeting. 7-10 January, 1991. Reno, Nevada.Google Scholar
3. Johnston, J. and Nishi, M. Vortex generator jets — a means for passive and active control of boundary-layer separation. AIAA Paper 89-0564. 27th Aerospace Sciences Meeting. 9-12 January, 1989. Reno, Nevada.Google Scholar
4. Selby, G., Lin, J. and Howard, F., Jet vortex generators for turbulent flow separation control. Paper from 12th Symposium on Turbulence, September 1990.Google Scholar
5. Rao, M.K. An Experimental Investigation of the Use of Air Jet Vortex Generators to Control Shock Induced Boundary-Layer Separation. PhD Thesis, City University, 1988.Google Scholar
6. Bray, T.P. A low speed parametric study of vane and air-jet vortex generators set in a turbulent flat plate boundary-layer. College of Aeronautics Report No 9711, Cranfield University, November 1997.Google Scholar
7. Bray, T.P. A Parametric Study of Vane and Air-Jet Vortex Generators. EngD Thesis, Cranfield University. 1998.Google Scholar
8. Pearcey, H.H. Shock induced separation and its prevention by design and boundary-layer control. In: Boundary-layer and Flow Control, its Principles and Application, 2, Lachmann, G.V. (Ed), Pergamon Press, Oxford, 1961.Google Scholar