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

[+] Author and Article Information
P. R. Farthing, J. M. Owen

Thermo-Fluid Mechanics Research Centre, School of Engineering and Applied Sciences, University of Sussex, Brighton, BN1 9QT, United Kingdom

J. W. Chew

Rolls Royce plc, Derby, DE2 8BJ, United Kingdom

J. Turbomach 113(1), 106-114 (Jan 01, 1991) (9 pages) doi:10.1115/1.2927727 History: Received January 27, 1989; Online June 09, 2008


A combined theoretical and experimental study is described in which deswirl nozzles were used to reduce the radial pressure drop in a rotating cavity with a radial inflow of air. The nozzles, which were attached to the outer part of the cavity, were angled such that the angular speed of the air at inlet could be in the opposite direction to that of the cavity. Solutions of the momentum-integral equations were used to predict the resulting radial distributions of pressure throughout the cavity. Flow visualization was used to confirm the flow structure, and transducers attached to one of the rotating disks in the cavity were used to measure the radial pressure distributions. Results are presented for “swirl fractions” (that is, the ratio of the angular speed of the air leaving the nozzles to that of the cavity) in the range −0.4 to +0.9, and for 0.01 < |Cw | Reφ −0.8 < 0.5, where Cw and Reφ are the nondimensional flow rate and rotational Reynolds number, respectively. The measured pressures are in good agreement with the predicted values, and the pressure drop across the cavity can be significantly less than that associated with solid-body rotation. The flow rate produced by the pressure drop across the cavity is not unique: There are up to three possible values of flow rate for any given value of pressure drop.

Copyright © 1991 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In