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Understanding and countering the swirl in S-ducts: tests on the sensitivity of swirl to fences

Published online by Cambridge University Press:  04 July 2016

J. Seddon
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Summary

Wind tunnel tests have been made on the effect of bottom wall and sidewall fences of various sizes and combinations in reducing the swirl of an S-duct at high angle of attack. It is shown that large reductions can be made: in some cases the swirl is eliminated or even reversed. Fences of modest size can be chosen to combine a large swirl reduction with an improvement of the total pressure distortion at high incidence and only a small effect on mean pressure recovery at low incidence. Some further observations are made on the nature of the general swirl phenomenon.

Type
Research Article
Information
The Aeronautical Journal , Volume 88 , Issue 874 , April 1984 , pp. 117 - 127
Copyright
Copyright © Royal Aeronautical Society 1984 

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Footnotes

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Aeronautical consultant

References

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