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The Flow in S-shaped Ducts

Published online by Cambridge University Press:  07 June 2016

P Bansod  and
P Bradshaw
P Bansod
Affiliation:
Department of Aeronautics, The City University
P Bradshaw
Affiliation:
Department of Aeronautics, Imperial College of Science and Technology
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Summary

Measurements are presented of total pressure, static pressure, surface shear stress and yaw angle in the flow through several S-shaped ducts, each with a thin turbulent boundary layer at entry. The results show that the region of low total pressure in the exit plane, found by previous workers, is due to expulsion of boundary-layer fluid by a pair of contra-totating vortices in the boundary layer. The generation of these vortices is explained: similarly-produced vortices, with similar effects, occur in some types of wind-tunnel contraction and possibly in other three-dimensional flows.

Information

Type
Research Article
Information
Aeronautical Quarterly , Volume 23 , Issue 2 , May 1972 , pp. 131 - 140
Copyright
Copyright © Royal Aeronautical Society. 1972

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