Research Papers

Modulation Phenomena in Stall Propagation

[+] Author and Article Information
John A. Rockett

Pratt and Whitney Aircraft, E. Hartford, Conn.

J. Basic Eng 81(3), 417-425 (Sep 01, 1959) (9 pages) doi:10.1115/1.4008494 History: Received September 11, 1958; Published September 01, 1959; Online February 20, 2019


Recent experimental work on stall propagation in a single-stage research compressor is described. At certain fixed operating points, several different stall patterns were found to exist. Transitions from one pattern to the other occurred spontaneously, reversibly, and fairly frequently. These transitions were studied in detail. A regular modulation of the stall-propagation velocity is associated with the transition process. The modulation is used to determine stall frequency as a function of both wave number and mass flow. Stall-cell size measurements, static-pressure surveys, and a study of the region downstream of the stall-propagating rotor are described.

Copyright © 1959 by ASME
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