A Short Diffuser With Low Pressure Loss

[+] Author and Article Information
R. C. Adkins

Thermal Power Group, The School of Mechanical Engineering, Cranfield Institute of Technology, Cranfield, Bedfordshire, England

J. Fluids Eng 97(3), 297-302 (Sep 01, 1975) (6 pages) doi:10.1115/1.3447306 History: Received June 16, 1975; Online October 12, 2010


A new design concept for gas turbine diffusers is presented and its potential verified by experimental data. The data were obtained from a series of research diffusers, both tubular and annular, with a range of area ratios from approximately 1.9:1 to 3.2:1 and with diffuser entry Mach number and velocity-profile distortion levels which simulated those encountered in engine systems. Measurements for all conditions tested are successfully correlated. From the correlations it is predicted that, in an engine, a pressure recovery in excess of 80 percent may be obtained with diffuser lengths only one-third that required by current design techniques, providing a bleed-off rate of approximately 3 percent of the main airflow can be tolerated at the diffuser throat. It is suggested that the bleedoff will be suitable for turbine cooling purposes.

Copyright © 1975 by ASME
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