Unsteady Flow in Diffusers

[+] Author and Article Information
A. H. M. Kwong, A. P. Dowling

Cambridge University, Engineering Department, Trumpington Street, Cambridge CB2 1PZ, United Kingdom

J. Fluids Eng 116(4), 842-847 (Dec 01, 1994) (6 pages) doi:10.1115/1.2911859 History: Received March 09, 1993; Revised March 22, 1994; Online May 23, 2008


The flow in a diffuser is unsteady in the range of optimum pressure recovery; diffusers can therefore be a major source of noise in pipework systems. A theory is developed to predict the frequency of this noise and good agreement with experimental results, for both conical and rectangular diffusers, is demonstrated. The acoustics of the duct to which a diffuser is connected are found to have a crucial effect on the unsteady flow within the diffuser, a point which has been overlooked previously in the literature. Once this is recognized, it is possible to reconcile experimental results for air and water diffusers.

Copyright © 1994 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