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Fine-scale turbulence structure of intermittent hear flows

Published online by Cambridge University Press:  26 April 2006

V. R. Kuznetsov ,
A. A. Praskovsky  and
V. A. Sabelnikov
V. R. Kuznetsov
Affiliation:
Central Institute of Aviation Motors, 2, Aviamotornaya. Moscow. 111250. Russia
A. A. Praskovsky
Affiliation:
Central Aero-Hydrodynamical Institute, Zhukovsky-3, Moscow region. 140160. Russia
V. A. Sabelnikov
Affiliation:
Central Aero-Hydrodynamical Institute, Zhukovsky-3, Moscow region. 140160. Russia
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Abstract

An experimental investigation of the fine-scale structure of turbulence was carried out. Five different shear flows were studied: three in a wind tunnel with an open working section and an elliptical nozzle and two in a wind tunnel of closed working section and square cross-section. The experiments tested two approaches to the theory of fine-scale turbulence structure: one based on the Navier-Stokes equations and the other on some similarity hypotheses. The variability of all fine-scale constants (including exponents in inertial-subrange power laws and the Kolmogorov constant) is revealed. A correlation between all fine-scale constants and the external intermittency coefficient is established.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 243 , October 1992 , pp. 595 - 622
Copyright
© 1992 Cambridge University Press

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