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Energies 2016, 9(3), 164; doi:10.3390/en9030164

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

1
Graduate School, Department of Mechanical Engineering, Mokpo National University, Mokpo, Jeollanam-do 58555, Korea
2
Department of Mechanical Engineering, Institute of New and Renewable Energy Technology Research, Mokpo National University, Mokpo, Jeollanam-do 58555, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Jang-Ho Lee
Received: 17 December 2015 / Revised: 22 February 2016 / Accepted: 1 March 2016 / Published: 4 March 2016
(This article belongs to the Special Issue Selected Papers from 5th Asia-Pacific Forum on Renewable Energy)

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. View Full-Text
Keywords: Francis turbine; runner design; port area; performance; loss analysis Francis turbine; runner design; port area; performance; loss analysis
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Chen, Z.; Singh, P.M.; Choi, Y.-D. Francis Turbine Blade Design on the Basis of Port Area and Loss Analysis. Energies 2016, 9, 164.

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