Momentum Flux Development From Three-Dimensional Free Jets

[+] Author and Article Information
J. P. Narain

Department of Aerospace Engineering Sciences, University of Colorado, Boulder, Colo.

J. Fluids Eng 98(2), 256-260 (Jun 01, 1976) (5 pages) doi:10.1115/1.3448277 History: Received July 03, 1975; Online October 12, 2010


The momentum-flux development from three-dimensional free jets has been investigated. The analysis is presented for free jets from circular, triangular, rectangular and elliptical orifices. The bluff jets, with eccentricity near unity, show the usual potential region and the axisymmetric decay region for the maximum axial velocity decay. The slender jets, with smaller than one eccentricity values, show three zones of flow development. The potential core region is followed by a characteristic decay region where velocity decay is dependent on the shape and eccentricity of the orifice. The maximum axial velocity of all slender jets finally decay axisymmetrically with increasing downstream distances.

Copyright © 1976 by ASME
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