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Small axisymmetric contraction of grid turbulence

Published online by Cambridge University Press:  28 March 2006

Mahinder S. Uberoi
Affiliation:
Department of Aerospace Engineering Sciences and the Joint Institute for Laboratory Astrophysics, University of Colorado, Boulder
Stanley Wallis
Affiliation:
Department of Aerospace Engineering Sciences, University of Colorado, Boulder Present address: Engineering Research Laboratories, Ford Motor Co., Dearborn, Mich.

Abstract

Anisotropic grid turbulence $(\overline{w^2} = \overline{v^2} \simeq \overline{u^2}/1.4)$ is passed through an axisymmetric nozzle of small contraction ratio followed by a straight section. Inside the contraction $\overline{v^2}(= \overline{w^2})$ and $\overline{u^2}$ tend to equalize, but their ratio approaches the original pre-contraction value in the straight section behind the contraction. Experiments were repeated with three grids of different mesh sizes and gave similar results.

Type
Research Article
Copyright
© 1966 Cambridge University Press

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References

Corrsin, S. 1942 A.E. Thesis, California Institute of Technology.
Uberoi, M. S. 1956 J. Aero. Sci. 23, 75.
Uberoi, M. S. 1957 J. Appl. Phys. 28, 116.