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Effects of Contraction Geometry on Non-Isotropic Free-Stream Turbulence

Published online by Cambridge University Press:  07 June 2016

A Klein  and
V Ramjee
A Klein
Affiliation:
Motoren- und Turbinen-Union, Munich
V Ramjee
Affiliation:
Indian Institute of Technology, Madras
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Summary

The effects of contraction geometry on non-isotropic free-stream turbulence were investigated experimentally. Eight nozzles of circular cross-section, having different contour shapes and various non-dimensional lengths, were tested. The contraction ratio was 10:1. The results are compared with test data for isotropic turbulence and with a well-known linear theory. It is found that the variation of the lateral component of turbulent energy along the nozzles is similar to that with isotropic free-stream turbulence, whereas the behaviour of the longitudinal component is entirely different. The change of turbulence depends on local contraction ratio only.

Type
Research Article
Information
Aeronautical Quarterly , Volume 24 , Issue 1 , February 1973 , pp. 34 - 38
Copyright
Copyright © Royal Aeronautical Society. 1973

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References

1 Batchelor, G K Proudman, I The effect of rapid distortion of a fluid in turbulent motion. Quarterly Journal of Applied Mathematics, Vol 7, pp 83–103, 1954.Google Scholar
2 Batchelor, G K The Theory of Homogeneous Turbulence. Cambridge University Press, 1959.Google Scholar
3 Uberoi, M S Effect of wind-tunnel contraction on free-stream turbulence. Journal of the Aeronautical Sciences, Vol 23, pp 754–764, 1956.Google Scholar
4 Thwaites, B On the design of contractions for wind tunnels. ARC R & M 2278, 1946.Google Scholar
5 Batchelor, G K Shaw, F S Consideration of the design of wind tunnel contractions. Australian Council for Aeronautics, Report ACA-4, 1944.Google Scholar
6 Bradshaw, P Pankhurst, R C The design of low-speed wind tunnels. Progress in Aeronautical Sciences, Vol 5, Macmillan, 1964.Google Scholar
7 Dryden, H L Schubauer, G B The use of damping screens for the reduction of wind-tunnel turbulence. Journal of the Aeronautical Sciences, Vol 14, pp 221-228, 1947.Google Scholar