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An experimental investigation of the aerodynamic characteristics of a cascade of circulation controlled aerofoils

Published online by Cambridge University Press:  04 July 2016

W. L. Flint  and
C. I. Holliday
W. L. Flint
Affiliation:
Dept of Mechanical Engineering, The University of Aston in Birmingham
C. I. Holliday
Affiliation:
Smiths Industries Aerospace and Defence Systems Co., PutneyDivision
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Summary

Typical performance characteristics are presented for a cascade of two-dimensional bluff aerofoils employing circulation control from a tangential blowing jet. The cascade was tested in various configurations at a freestream Mach number of 0·3 and Reynolds number of approximately 1·5 x 105. Lift and drag coefficients and stream deflection are related to the blowing jet momentum coefficient. The expressions employed for lift and drag eliminate the direct effect of the blowing jet on measured performance, which was found to be influenced strongly by vortex shedding at low jet blowing rates.

For the configurations employed, tests showed that the economical application of circulation control on an uncambered blade could produce flow turning angles up to 20°.

Type
Research Article
Information
The Aeronautical Journal , Volume 86 , Issue 852 , February 1982 , pp. 68 - 75
Copyright
Copyright © Royal Aeronautical Society 1982 

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