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Fluid-structure interaction in a pump-as-turbine operating at part load

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Dahal, P, Henderson, A ORCID: 0000-0002-7359-6402, Wang, X ORCID: 0000-0003-4293-7523 and Giosio, D ORCID: 0000-0002-4083-7791 2018 , 'Fluid-structure interaction in a pump-as-turbine operating at part load', paper presented at the 20th International Seminar on Hydropower Plants, 14-16 November 2018, Vienna, Austria.

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Abstract

Hydro turbines are increasingly required to operate outside their best efficiency point (BEP) in order to meet network demand. Such operation affects turbine efficiency and decreases asset life. This study examines the fluid structural interaction (FSI) inside a pump as turbine (PAT) operating at BEP and low load. The simulation results of low load operation shows recirculating flow in the blade passages and an unstable vortex below the runner. From the FSI analysis, peak stress levels on the turbine between the band and blade were found to be 6.8 times higher at low load than at BEP operation.

Item Type: Conference or Workshop Item (Paper)
Authors/Creators:Dahal, P and Henderson, A and Wang, X and Giosio, D
Keywords: CFD, hyrdo turbine, part load
Journal or Publication Title: Proceedings of the 20th International Seminar on Hydropower Plants
Publisher: Institute for Energy Systems and Thermodynamics
Copyright Information:

Copyright 2018 Institute for Energy Systems and Thermodynamics

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