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Grid turbulence at large Reynolds numbers

Published online by Cambridge University Press:  28 March 2006

A. L. Kistler  and
T. Vrebalovich
A. L. Kistler
Affiliation:
Jet Propulsion Laboratory, Pasadena, California
T. Vrebalovich
Affiliation:
Jet Propulsion Laboratory, Pasadena, California
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Abstract

Measurements of grid turbulence have been obtained for grid Reynolds numbers ranging from 2·4 × 106 to 1·2 × 105. The decay law and the effect of Reynolds number on the turbulence level are established. The measured power spectra of the turbulence are consistent with Kolmogoroff scaling for kη > 0·1 (k is the wave-number and η is the Kolmogoroff length); but for kη < 0·1, the spectra of the stream-wise turbulence velocity component and of the cross-stream component do not appear to be isotropically related. However, the stream-wise spectrum does display a $-\frac{5}{3}$ region, which increases in extent with increasing Reynolds number.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 26 , Issue 1 , September 1966 , pp. 37 - 47
Copyright
© 1966 Cambridge University Press

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Footnotes

This paper presents the results of one phase of research carried out at the Jet Propulsion Laboratory, California Institute of Technology, under Contract No. NAS 7–100, sponsored by the National Aeronautics and Space Administration.

References

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