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The round turbulent jet in a cross-wind

Published online by Cambridge University Press:  28 March 2006

J. F. Keffer  and
W. D. Baines
J. F. Keffer
Affiliation:
Department of Mechanical Engineering, University of Toronto, Toronto
W. D. Baines
Affiliation:
Department of Mechanical Engineering, University of Toronto, Toronto
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Abstract

The flow of a jet directed normal to a uniform, steady cross-wind is considered. Experimental results show that for various jet strengths, the position of the jet in space, when stretched by the ratio of jet to cross-wind momenta, is described by a single function. Exceptions exist at very low velocity ratios where a shift of the potential core is evident. A natural system of axes is used to define important directions of the flow. The integrated equation of motion along the primary jet flow direction is made dimensionless after the general method of Morton (1961) and a virtual source is defined for the flow. It is shown that a single functional behaviour of the axial jet velocity exists for various velocity ratios if the jet is considered to originate from this source. Lateral velocity profiles show a similarity when scaled by appropriate lengths and velocities but true self-preservation is not attained.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 15 , Issue 4 , April 1963 , pp. 481 - 496
Copyright
© 1963 Cambridge University Press

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