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RESEARCH PAPERS

Laminar Boundary Layer Near the Rotating End Wall of a Confined Vortex

[+] Author and Article Information
W. J. Shakespeare

Bell Telephone Laboratories, Holmdel, N.J. 07733

E. K. Levy

Lehigh University, Bethlehem, Pa.

J. Fluids Eng 104(2), 171-177 (Jun 01, 1982) (7 pages) doi:10.1115/1.3241804 History: Received June 30, 1980; Online October 26, 2009

Abstract

The results of an experimental and theoretical investigation of the fluid mechanics in a confined vortex are discussed with particular emphasis on behavior away from the axis of symmetry and near the end walls. The vortex is generated in a rotating cylindrical chamber with an exit opening in one end. Both end walls rotate. For the range of flow rates and swirl ratios (1≤S≤5) of interest here, the flow field far from the end walls behaves as inviscid and irrotational; and the end wall boundary layers are thin and laminar. Measurements and calculations of tangential and radial velocity in the end wall region show the development of a secondary flow resulting in a strong velocity “overshoot” in the radial component. Results illustrating the nature of the velocity variations on the end walls are presented; and it is shown that the mass flow rate through the end wall boundary layers, while only a small fraction of the total flow, increases with increasing swirl and with decreasing total flow rate through the chamber.

Copyright © 1982 by ASME
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