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Numerical assessment of parameters influencing the modal response of a Kaplan turbine model
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Numerical assessment of parameters influencing the modal response of a Kaplan turbine model
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Journal Article
Numerical assessment of parameters influencing the modal response of a Kaplan turbine model
2021
Overview
The present study intends to investigate numerically the impact of: i) the fluid added mass, ii) the turbine rotational speed and iii) the variation of the runner blade bearing stiffness due to the turbine water head on the modal response of a reduced scale Kaplan turbine. The impact of each variable has been quantified by means of a series of numerical modal analyses of the turbine in vacuum and in water, and at rest and rotating. It has been found that the natural frequencies of the Kaplan turbine model are sensitive to all the variables investigated in the present paper, the added mass being the factor which has the greatest impact.
Publisher
IOP Publishing
