Shock and Vibration

Shock and Vibration / 2000 / Article

Open Access

Volume 7 |Article ID 406976 | https://doi.org/10.1155/2000/406976

Andrej Predin, Roman Klasinc, "Emergency Gate Vibration of the Pipe-Turbine Model", Shock and Vibration, vol. 7, Article ID 406976, 11 pages, 2000. https://doi.org/10.1155/2000/406976

Emergency Gate Vibration of the Pipe-Turbine Model

Received14 Oct 1998
Revised23 Nov 1999

Abstract

The vibration behavior of an emergency gate situated on a horizontal-shaft Kaplan turbine is studied. The analysis and transfer of the dynamic movements of the gate are quite complex. In particular the behavior is examined of the emergency gate for the case when the power unit is disconnected from the system or there is a breakdown of the guide vane system at the moment when the maximal head and capacity are achieved. Experimental-numerical methods both in the time domain and in the frequency domain are employed. Natural vibrations characterize a first zone, corresponding to relatively small gate openings. As the gate opening increases, the vibration behavior of the gate becomes increasingly dependent on the swirl pulsations in the draft tube of the turbine. Finally, the data transfer from the model to the prototype by use of the dynamic similitude law is discussed.

Copyright © 2000 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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