Francis Turbine Blade Design on the Basis of Port Area and Loss Analysis

Zhenmu Chen, Patrick M. Singh and Young-Do Choi
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Zhenmu Chen: Graduate School, Department of Mechanical Engineering, Mokpo National University, Mokpo, Jeollanam-do 58555, Korea
Patrick M. Singh: Graduate School, Department of Mechanical Engineering, Mokpo National University, Mokpo, Jeollanam-do 58555, Korea
Young-Do Choi: Department of Mechanical Engineering, Institute of New and Renewable Energy Technology Research, Mokpo National University, Mokpo, Jeollanam-do 58555, Korea

Energies, 2016, vol. 9, issue 3, 1-12

Abstract: In this study, a Francis turbine with specific speed of 130 m-kW was designed on the basis of the port area and loss analysis. The meridional shape of the runner was designed focusing mainly on the combination of the guide vane loss analysis and experience. The runner blade inlet and outlet angles were designed by calculation of Euler’s head, while the port area of blade was modified by keeping constant angles of the blade at inlet and outlet. The results show that the effect of the port area of runner blade on the flow exit angle from runner passage is significant. A correct flow exit angle reduces the energy loss at the draft tube, thereby improving the efficiency of the turbine. The best efficiency of 92.6% is achieved by this method, which is also similar to the design conditions by the one dimension loss analysis.

Keywords: Francis turbine; runner design; port area; performance; loss analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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