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The relationship between the base pressure on a bluff body and the velocity at separation

Published online by Cambridge University Press:  04 July 2016

J. E. L. Simmons
J. E. L. Simmons*
Affiliation:
Cambridge University Engineering Department
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Extract

In the modified free-streamline theory for the separated flow past bluff bodies due to Roshko, the velocity on the separated free streamlines is expressed as

Uv=kU0,

where U0 is the velocity of the undisturbed stream and k is a constant. If it is assumed that the pressure on the base of the body is uniform and equal to the pressure on the free streamline, then application of Bernoulli's equation leads to;

k =(1-Cpb)½,… (1)

where Cpb is the base pressure coefficient.

Type
Technical notes
Information
The Aeronautical Journal , Volume 78 , Issue 763 , July 1974 , pp. 330 - 331
Copyright
Copyright © Royal Aeronautical Society 1974 

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References

1. Roshko, A. A new hodograph for free streamline theory. NACA TN 3168, 1954.Google Scholar
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