Improved Vane-Island Diffusers at High Swirl PUBLIC ACCESS

[+] Author Affiliations
Tong Jiang, Tah-teh Yang

Clemson University, Clemson, SC

Paper No. 82-GT-68, pp. V001T01A026; 9 pages
  • ASME 1982 International Gas Turbine Conference and Exhibit
  • Volume 1: Turbomachinery
  • London, England, April 18–22, 1982
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7956-6
  • Copyright © 1982 by ASME


The results of an experimental investigation of the performance of vane-island diffusers at high swirl [λ = 9] are presented in this paper. These results show the advantage of the 14-vane versus several 8-vane configurations. Four sets of 14 straight vanes are used in this study as compared to five sets of eight vanes in a previous investigation. The 14-vane configuration results in a 40 percent reduction in pressure loss coefficient below that obtained with eight vane configurations. The lowest loss coefficient obtained in the present investigation is achieved when the vane leading edge is at a radius approximately equal to 1.2 times the diffuser inlet radius. The experimental results are presented in the form of pressure rise versus radial location along the diffuser, diffuser effectiveness versus flow coefficient, and minimum pressure loss coefficient versus flow coefficient.

Copyright © 1982 by ASME
Topics: Diffusers
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