On the hydraulic axial thrust of Francis hydro-turbine |
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| Authors: | Xing-Ying Ji Xiao-Bin Li Wen-Tao Su Xu Lai Tian-Xiao Zhao |
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| Affiliation: | 1.State Key Laboratory of Hydropower Equipment,Harbin,China;2.School of Energy Science and Engineering,Harbin Institute of Technology,Harbin,China;3.The State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan,China;4.Department of Mathematical Sciences,Tsinghua University,Beijing,China |
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| Abstract: | We present a new method for the computation of hydraulic axial thrust of Francis hydro-turbine. This approach combines the computation of axial thrust on the crown, band and blade by using the numerical simulation and calculation of the pressure distribution outside the crown and band based on the theory of fluid mechanics. The axial thrusts are calculated for different flow conditions with various suction head and flow rate. The calculated results are consistent with that of experimental test on the prototype hydro-turbine, and this combination is proven to be an effective way to assess the magnitude of hydraulic axial thrust for hydro-turbine. Also, the suction head of the turbine is shown to have significant influence on the hydraulic axial thrust. |
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