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Flow Modeling and Runner Design Optimization in Turgo Water Turbines
Abstract:The incorporation of computational fluid dynamics in the design of modern hydraulic turbines appears to be necessary in order to improve their efficiency and cost-effectiveness beyond the traditional design practices. A numerical optimization methodology is developed and applied in the present work to a Turgo water turbine. The fluid is simulated by a Lagrangian mesh-free approach that can provide detailed information on the energy transfer and enhance the understanding of the complex, unsteady flow field, at very small computing cost. The runner blades are initially shaped according to hydrodynamics theory, and parameterized using Bezier polynomials and interpolation techniques. The use of a limited number of free design variables allows for various modifications of the standard blade shape, while stochastic optimization using evolutionary algorithms is implemented to find the best blade that maximizes the attainable hydraulic efficiency of the runner. The obtained optimal runner design achieves considerably higher efficiency than the standard one, and its numerically predicted performance is comparable to a real Turgo turbine, verifying the reliability and the prospects of the new methodology.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1072886Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 3598
 A.H. Gibson, Hydraulics and its applications. Constable & Co Ltd, UK, 1952.
 L. Gaorong, Small Hydro Power in China, Experience and Technology. Hangzhou Regional Center for Small Hydro Power, Hangzhou, 1996.
 L. Gaorong, A Manual of China Small-Hydraulic Turbine-Generating Units. Hangzhou Regional Center for Small Hydro Power, Hangzhou, 1997.
 J. Bednar, Turbiny. SNTL Nakladatelstvi Technicke Literatury, Praha, 1989.
 M. Nechleba, Hydraulic Turbines. Their Design and Equipment. ARTIA, Prague, 1957.
 H. Brekke, A general study on the design of vertical Pelton turbines. Turboinstitut, Ljubljana, rep. No/46/3/Ada, 1984.
 S. Kvicinsky, F. Longatte, F. Avellan, and J.-L. Kueny, "Free surface flows: Experimental validation of the Volume of Fluid (VOF) method in the plane wall case," Proceedings, 3rd ASME/JSME Conference, San Francisco, ASME, N.Y., 1998.
 A. Perrig, M. Farhat, F. Avellan, E. Parkinson, H. Garcin, C. Bissel, M. Valle, and J. Favre, "Numerical flow analysis in a Pelton turbine bucket, Proceedings," 22nd IAHR Symposium on Hydraulic Machinery and Systems, June 29 - July 2, Stockholm, Sweden, 2004.
 A. Perrig, F. Avellan, J.-L. Kueny, M. Farhat, and E. Parkinson, "Flow in a Pelton turbine bucket: Numerical and experimental investigations," ASME Trans., Journal of Fluids Engineering, Vol. 128, 2006, pp. 350- 358.
 J. Anagnostopoulos, and D. Papantonis, "Experimental and numerical studies on runner design of Pelton turbines," Hydroenergia 2006, 7-9 June, Crieff, Scotland, UK, 2006.
 J. Anagnostopoulos, and D. Papantonis, "A numerical methodology for design optimization of Pelton turbine runners," HYDRO 2006, 25-27 September, Porto Carras, Greece, 2006.
 K.C. Giannakoglou, "Design of optimal aerodynamic shapes using stochastic optimization methods and computational intelligence," Progress in Aerospace Science, Vol. 38, 2002, pp. 43-76.