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The Attachment of a Ventilated Plane Jet to an Inclined Plane Wall

Published online by Cambridge University Press:  07 June 2016

G.F. Marsters
G.F. Marsters*
Affiliation:
Queen’s University, Kingston, Ontario
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Summary

The behaviour of a plane jet issuing in the neighbourhood of a plane wall has been studied experimentally. Such arrangements may find application in jet augmented flaps for STOL aircraft development. The essential features of this configuration are the gap between the wall and the jet nozzle, permitting entrainment of secondary flow, and the inclination of the plane wall with respect to the nozzle axis.

Measurements of velocity profiles, wall static pressure distributions and turbulence intensities reveal the presence of extensive regions of low pressure over the wall, strong pressure gradients resulting in the highly curved flow, a fair degree of self-preservation of the mean velocities, but no particularly unusual features observed in the turbulence quantities. The size of the gap, the wall angle and the wall length all influence the reattachment location, and limits of gap, angle and length for which reattachment occurs are shown. The sub-ambient static pressure regions give rise to significant forces on the wall; these forces are primarily due to the entrainment feature.

Type
Research Article
Information
Aeronautical Quarterly , Volume 29 , Issue 2 , May 1978 , pp. 60 - 74
Copyright
Copyright © Royal Aeronautical Society. 1978

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References

1 Marsters, G.F. The Ventilated Wall Jet, presented at CANCAM 77, Vancouver, Canada, May/June 1977. Also, “The Attachment of a Plane Ventilated Jet to a Plane Parallel Wall”, Thermo Science Report 2/77, Dept. of Mechanical Engineering, Queen’s University, Kingston, Ontario. (To be publ. CSME Trans.)Google Scholar
2 Bourque, C. Newman, B.G. Reattachment of a Two-Dimensional Incompressible Jet to an Adjacent Flat Plate, Aeronautical Quarterly, Vol. XI, August 1960, pp. 201–232.Google Scholar
3 Marsters, G.F. The Interaction of Two Plane Parallel Jets, AIM Journal, Vol. 15, No. 12, December 1977, pp. 1756–1762.Google Scholar
4 Wilson, D.J. An Experimental Investigation of the Mean Velocity, Temperature and Turbulence Fields in Plane and Curved Two-Dimensional Wall Jets: Coanda Effect, Ph.D. Thesis, University of Minnesota, 1970.Google Scholar