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2013 | OriginalPaper | Chapter

6. Stability-Related Unsteady Phenomena

Authors : Peter Dörfler, Mirjam Sick, André Coutu

Published in: Flow-Induced Pulsation and Vibration in Hydroelectric Machinery

Publisher: Springer London

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Abstract

This chapter presents a number of common oscillation phenomena which are not due to a direct external force but due to a feedback mechanism which may depend on the response of a larger system. Accordingly, the frequency of this kind of fluctuation is dictated by a natural frequency rather than a forcing frequency. For example, if a small displacement in a turbine runner creates a labyrinth force that tends to increase the displacement, then this may suddenly start a whirling motion at a natural bending frequency of the shaft line.

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previous chapter Cavitation-Related Phenomena
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Metadata
Title
Stability-Related Unsteady Phenomena
Authors
Peter Dörfler
Mirjam Sick
André Coutu
Copyright Year
2013
Publisher
Springer London
Book
Flow-Induced Pulsation and Vibration in Hydroelectric Machinery

Print ISBN: 978-1-4471-4251-5

Electronic ISBN: 978-1-4471-4252-2

Copyright Year: 2013

DOI
https://doi.org/10.1007/978-1-4471-4252-2_6