The Use of Fins to Reduce the Pressure Drop in a Rotating Cavity With a Radial Inflow

[+] Author and Article Information
J. W. Chew, B. Stratford

Rolls-Royce plc, Derby, United Kingdom

P. R. Farthing, J. M. Owen

Thermo-Fluid Mechanics Research Center, School of Engineering and Applied Sciences, University of Sussex, Brighton, United Kingdom

J. Turbomach 111(3), 349-356 (Jul 01, 1989) (8 pages) doi:10.1115/1.3262279 History: Received October 13, 1987; Online November 09, 2009


A combined theoretical and experimental study of radial inflow through a rotating cavity is reported. It is shown that radial fins attached to one of the disks are effective in reducing the pressure drop across the cavity. The mathematical model, is an extension of earlier plane-disk momentum-integral methods; the fins are treated as rectangular rib elements and a rough-disk model is derived. Numerical solutions of the integral equations are given. An approximate linear solution is also derived. Experiments were conducted when both disks were plane and when one of the disks was fitted with 60 radial fins. Flow visualization revealed the flow structure in the cavity and confirmed some of the assumptions used in the theoretical model. Measurements and predictions of the pressure drop across the cavity were in reasonable agreement.

Copyright © 1989 by ASME
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