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Selection of Optimal Number of Francis Runner Blades for a Sediment Laden Micro Hydropower Plant in Nepal
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 Title & Authors
Selection of Optimal Number of Francis Runner Blades for a Sediment Laden Micro Hydropower Plant in Nepal
Baidar, Binaya; Chitrakar, Sailesh; Koirala, Ravi; Neopane, Hari Prasad;
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The present study is conducted to identify a better design and optimal number of Francis runner blades for sediment laden high head micro hydropower site, Tara Khola in the Baglung district of Nepal. The runner is designed with in-house code and Computational Fluid Dynamics (CFD) analysis is performed to evaluate the performance with three configurations; 11, 13 and 17 numbers of runner blades. The three sets of runners were also investigated for the sediment erosion tendency. The runner with 13 blades shows better performance at design as well as in variable discharge conditions. 96.2% efficiency is obtained from the runner with 13 blades at the design point, and the runners with 17 and 11 blades have 88.25% and 76.63% efficiencies respectively. Further, the runner with 13 blades has better manufacturability than the runner with 17 blades as it has long and highly curved blade with small gaps between the blades, but it comes with 65% more erosion tendency than in the runner with 17 blades.
CFD;Francis turbine;Sediment erosion;Efficiency;Performance;Optimum number of blades;
 Cited by
P. M. Pradhan, P.N. Joshi, M.B. Biswakarma and H. Stole, 2004, "Sediment and Thermodynamic efficiency measurement in Jhimruk hydropower plant, Nepal in Monsoon 2003", In: Proceedings of Ninth international symposium on river sedimentation, China.

B.S. Thapa, O. G. Dahlhaug and B. Thapa, 2015, "Sediment erosion in hydro turbines and its effect on the flow around guide vanes of Francis turbine", Renewable and Sustainable Energy Reviews, Vol. 49, pp. 1100-1113. crossref(new window)

H.P. Neopane, 2010, "Sediment erosion in hydro turbines", Doctoral thesis at NTNU.

M. Eltvik, 2013, 'Sediment erosion in Francis turbines, Doctoral theses, NTNU.

S. Lais, Q. Liang, U. Henggeler, T. Weiss, X. Escaler and E. Egusquiza, 2009, "Dynamic Analysis of Francis Runners - Experiment and Numerical Simulation", International Journal of Fluid Machinery and Systems, Vol. 2, No. 4, pp. 330-314.

P. Kerschberger and A. Gehrer, 2010, "Performance Optimization of High Specific Speed Pump-Turbines by Means of Numerical Flow Simulation (CFD) and Model Testing", International Journal of Fluid Machinery and Systems, Vol. 3, No. 4, pp. 352-359. crossref(new window)

K.P. Shrestha, B. Thapa, O.G. Dahlhaug, H.P. Neopane, N. Gurung and A. Kayastha,2013, "Optimized Design of Francis Turbine Runner for Sand Laden Water", Hydro Nepal Journal, Issue no. 13

Y. Wang, S. Zhang and G. Chen, 2012, "Optimal selection of blade number of hydraulic turbine based on Computational Fluid Dynamics", Power Electronics and Motion Control Conference (IPEMC), 7th International, Vol. 1.

S. Chitrakar, M. Cervates and B.S. Thapa, 2014, "Fully coupled FSI analysis of Francis turbines exposed to sediment erosion", International Journal of Fluid Machinery and Systems, Vol. 7, No. 3, pp. 101-109. crossref(new window)

M. Harano, K. Tani and S. Nomot,2006, "Practical Application of High-performance Francis-turbine Runner fitted with Splitter Blades at Ontake and Shinkurobegawa No. 3 Power Stations of THE KANSAI ELECTRIC POWER CO., INC.", Hitachi Review, Vol. 55, No. 3.

P. Mazurewski, V. Hasmatuchi, H.P. Mombelli, D. Burggraeve, J. Iosfin, P. Finnegan and F. Avellan, 2009, "Surface Roughness Impact on Francis Turbine Performances and Prediction of Efficieny Step Up", International Journal of Fluid Machinery and Systems, Vol. 2, No. 4, pp. 353-362. crossref(new window)

B.S. Thapa, B. Thapa, M. Eltvik, K. Gjosoeter and O.G. Dahlhaug,2012, "Optimizing runner blade profile Francis turbineto minimize sediment erosion",26th IAHR symposium on Hydraulic Machinery and Systems, IAHRXXVI-071, Beijing, China.

M. Eltvik, G. Olimstad and E.C. Walseth, 2009, "High Pressure Hydraulic Machinery", NTNU publication.

ANSYS, CFX-Solver Theory Guide, 2012.

B.S Thapa, B. Thapa and O. G. Dahlhaug, 2012, "Current research in hydraulic turbines for handling sediments", Energy, Vol. 47, pp. 62-69. crossref(new window)

S. Munstean, A. Ruprech, R. Susan-Resiga, 2007, "Development of a swirling flow apparatus for analysis and development of swirling flow control", 3rd German-Romanian workshop on Turbomachinery hydrodynamics.