Influence of Casing Treatment on the Operating Range of Axial Compressors PUBLIC ACCESS

[+] Author Affiliations
J. Paulon

Office National d’Etudes et de Recherches Aérospatiales, Châtillon, France

D. Dehondt

Turbomeca, Bordes, Bizanos

Paper No. 82-GT-103, pp. V001T01A042; 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


Experimental investigations brought to light the possibilities of broadening the operating range of axial flow compressors by means of outer wall casing treatments such as grooves, honeycombs or cavities. The industrial use of these techniques is however limited by uncertainties on the effectiveness of these treatments as, while they are very beneficial in some cases, they deteriorate the performance of the machine in some others. A theoretical investigation has been conducted on the flow field in cavities most commonly used, and laws for determining the groove depth have been established which account for the surge margin improvement obtained in some cases and make it possible to dismiss inefficient geometric configurations. A comparison between theory and experiment is presented, based on test results published in the literature and on an experimentation on two industrial compressors.

Copyright © 1982 by ASME
Topics: Compressors
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