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Parametric Analysis of Turbulent Wall Jets

Published online by Cambridge University Press:  07 June 2016

K Yegna Narayan  and
R Narasimha
K Yegna Narayan
Affiliation:
Indian Institute of Science, Bangalore
R Narasimha
Affiliation:
Indian Institute of Science, Bangalore
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Summary

The concept of a fully-developed flow based on the hypothesis of selective memory is here applied to general wall-jet type flows. In the presence of a (constant) external stream, the free-stream velocity and the jet momentum flux are taken to be the chief quantities governing the development of the wall jet: two additional non-dimensional parameters, representing a momentum flux Reynolds number and the relative momentum defect in the initial boundary layer, are shown to have only a secondary effect on the fully-developed flow. The standard correlations so determined are also found to predict quite well the flow development in Gartshore and Newman’s experiments on wall jets in adverse pressure gradients; possible reasons for this somewhat surprising result are discussed. Finally it is shown, by application to the still-air case, that the parameters discovered in incompressible flow are, with appropriate but straightforward modification, successful in describing compressible wall jets also.

Type
Research Article
Information
Aeronautical Quarterly , Volume 24 , Issue 3 , August 1973 , pp. 207 - 218
Copyright
Copyright © Royal Aeronautical Society. 1973

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References

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