Stabilization of Turbulent Axisymmetric Rotating Flows

The turbulent entrainment mechanism of a swirling plume surrounded by a potential vortex and a swirling jet and a wake in a uniform stream has been discussed. With the assumption of the stream-wise similarity of various flow variables, the integrated conservation equations yield a rate of entrainmen...

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Bibliographic Details
Published in:Journal of applied mechanics 1974-12, Vol.41 (4), p.879-884
Main Author: Narain, J. P
Format: Article
Language:English
Online Access:Get full text
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Summary:The turbulent entrainment mechanism of a swirling plume surrounded by a potential vortex and a swirling jet and a wake in a uniform stream has been discussed. With the assumption of the stream-wise similarity of various flow variables, the integrated conservation equations yield a rate of entrainment function which explicitly shows that the external potential vortex retards the rate of entrainment whereas the positive density gradients across the plume interact with the surrounding vortex to weakly increase the rate of entrainment. In a uniform stream, the swirling jets and wakes show distinctly opposite behavior. An increasing initial swirl delays the dissipation of the swirling wake whereas it promotes the dissipation of a swirling jet. The coaxial uniform free stream always retards the rate of entrainment across the swirling jet.
ISSN:0021-8936
1528-9036
DOI:10.1115/1.3423476