Unsteady Viscous Flow in a High-Speed Core Compressor

[+] Author and Article Information
M. A. Cherrett, J. D. Bryce

Propulsion Department, Royal Aerospace Establishment, Pyestock, Farnborough, Hants, United Kingdom

J. Turbomach 114(2), 287-294 (Apr 01, 1992) (8 pages) doi:10.1115/1.2929142 History: Received February 19, 1991; Online June 09, 2008


A probe incorporating a miniature high-frequency response pressure transducer has been traversed behind the first three stages of a high-speed multistage compressor operating at throttle settings corresponding to near choke, peak efficiency, and near surge. A novel method of compensating for transducer temperature sensitivity was employed. Consequently, time-averaged pressures derived from the transducer were found to be in good agreement with pneumatic pressure measurements. Analysis of the unsteady pressure measurements revealed both the periodic and random fluctuations in the flow field. This provided information on rotor-rotor interaction effects and the nature of viscous blade wake and secondary flows in each stage.

Copyright © 1992 by The American Society of Mechanical Engineers
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