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A study of wall jets resulting from single and multiple inclined jet impingement

Published online by Cambridge University Press:  04 July 2016

P. Miller
P. Miller*
Affiliation:
Miller & Wilson Aerodynamics Research Bath, UK
*
†Now with the British Defence Staff, British Embassy, Washington DC.
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Extract

An experimental investigation into the wall jets created by a single inclined, twin inclined and a four inclined jet impingement arrangement is described. Wall jet velocity profiles were recorded at various azimuthal and radial locations for a range of nozzle heights at jet pressures representative of current V/Stol technology. Use was made of wall jet properties established for a normal jet impingement to provide a means of comparing the attributes of the various configurations. Non-splayed twin inclined impinging jets generate symmetry plane reinforcement and weakening in regions remote from the interaction. Splayed jet geometries show significant height effects on ground plane flow development. The four-jet configuration also demonstrates velocity reinforcement at the lines of wall jet interaction, together with a weakening of the flows remote from the interaction planes. Reinforcement velocities for the four-jet case are significantly lower than those expected from the constituent twin-jet flows.

Type
Research Article
Information
The Aeronautical Journal , Volume 99 , Issue 986 , July 1995 , pp. 201 - 216
Copyright
Copyright © Royal Aeronautical Society 1995 

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