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RESEARCH PAPERS

Self-Excited Vibration of a Hydraulic Turbine

[+] Author and Article Information
C. C. Crawford, F. O. Ruud

Applied Mathematics and Mechanics Section, Bureau of Reclamation, Department of the Interior, Denver, Colo.

J. Eng. Power 89(4), 573-576 (Oct 01, 1967) (4 pages) doi:10.1115/1.3616741 History: Received August 03, 1966; Online August 25, 2011

Abstract

Severe vibration of a hydraulic turbine was found to be self-excited. Vibration at the natural frequency when operating at synchronous speed produced self-sustaining whirl of the shaft. Gyroscopic action of the turbine runner caused the vibration to be self-excited. Admission of relatively small amounts of compressed air to the region between the headcover baffle plate and the crown of the runner stopped the vibration by preventing buildup of a rotating pressure field.

Copyright © 1967 by ASME
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