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On the organized motion of a turbulent plane jet

Published online by Cambridge University Press:  20 April 2006

R. A. Antonia ,
L. W. B. Browne ,
S. Rajagopalan  and
A. J. Chambers
R. A. Antonia
Affiliation:
Department of Mechanical Engineering, University of Newcastle, N.S.W. 2308, Australia
L. W. B. Browne
Affiliation:
Department of Mechanical Engineering, University of Newcastle, N.S.W. 2308, Australia
S. Rajagopalan
Affiliation:
Department of Mechanical Engineering, University of Newcastle, N.S.W. 2308, Australia
A. J. Chambers
Affiliation:
Department of Mechanical Engineering, University of Newcastle, N.S.W. 2308, Australia
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Abstract

Measurements of space–time correlations of longitudinal and normal velocity fluctuations and of temperature fluctuations support the existence of counter-rotating spanwise structures appearing alternately on opposite sides of the jet centreline in the self-preserving region of the flow. The frequency of these structures closely satisfies self-preservation. The asymmetric arrangement of the structures is first observed downstream of the position where the jet mixing layers nominally merge but upstream of the onset of self-preservation. Closer to the jet exit, the space–time correlations indicate the existence of spanwise structures that are symmetrical about the centreline.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 134 , September 1983 , pp. 49 - 66
Copyright
© 1983 Cambridge University Press

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