NDLI: Numerical simulation of pressure fluctuation in Kaplan turbine

Content Provider	Springer Nature Link
Author	Liu, ShuHong Shao, Jie Wu, ShangFeng Wu, YuLin
Copyright Year	2008
Abstract	As it is almost impossible to carry out the prototype hydro-turbine experiment before the power plant is built up, rational prediction of pressure fluctuations in the prototype turbine is very important at the design stage. From this viewpoint, we at first treated the unsteady turbulent flow computation based on the modified RNG k-ɛ turbulence model through the whole flow passage to simulate the pressure fluctuation in a model turbine. Since fair agreement was recognized between the numerical results and the experimental data, this numerical method was applied to simulate the pressure fluctuations in the prototype turbine. From the comparison of them with the model turbine results, it is seen that their qualitative trend of pressure fluctuations are similar, but an appreciable difference is observed between the amplitudes of pressure fluctuation of the prototype turbine and that of the model turbine. Though the present findings may be explained by the effect of Reynolds number, further studies are expected for quantitative interpretation. We paid attention to the interaction between the fluid and turbine structure. Adopting a weak fluid-solid coupling method, we studied the pressure fluctuation in the prototype turbine to clarify how the elastic behavior of runner blades influenced the characteristics of pressure fluctuation.
Starting Page	1137
Ending Page	1148
Page Count	12
File Format	PDF
ISSN	10069321
Journal	Science in China Series E: Technological Sciences
Volume Number	51
Issue Number	8
e-ISSN	1862281X
Language	English
Publisher	SP Science in China Press
Publisher Date	2008-07-06
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	RNG k-ɛ turbulence model Kaplan turbine pressure fluctuation unsteady flow simulation Engineering
Content Type	Text
Resource Type	Article
Subject	Engineering Materials Science

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