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Supercritical Reynolds number simulation for two-dimensional flow over circular cylinders

Published online by Cambridge University Press:  29 March 2006

Edmond Szechenyi
Edmond Szechenyi
Affiliation:
Office National d'Etudes et de Recherches Aérospatiales (ONERA), 92320 Châtillon, France
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Abstract

In wind-tunnel tests on bluff bodies the Reynolds number is often limited to values that are very much smaller than those of the flows being simulated. In such cases the experiments may have no practical significance whatsoever since both the fluctuating and the steady aerodynamic phenomena can vary considerably with Reynolds number.

This difficulty was encountered in an investigation of supercritical incompressible flow over cylinders, and an attempt at artificially increasing the Reynolds number by means of surface roughness was made. In order to evaluate this simulation technique, the influence of various grades of surface roughness on the aerodynamic forces acting on cylinders of different diameters was studied over a wide range of Reynolds numbers in two very different wind tunnels. The results allow very positive conclusions to be drawn.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 70 , Issue 3 , 12 August 1975 , pp. 529 - 542
Copyright
© 1975 Cambridge University Press

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