캠버각 변화에 따른 소수력 축류 프로펠러 수차의 유동 특성 연구
Performance Characteristics of an Axial Propeller Small-hydro Turbine with Various Cambers of Runner Blade
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The aim of this paper is to examine the hydraulically optimized camber of a blade. Prior studies have tried to determine the sound method of design on small-hydro turbines. These have appeared to realize a reasonably efficient small-hydro turbine. Nonetheless, specific and accurate design data have not as yet been established for the shape of the runner blade. Hence, this study examines the performance characteristic of an axial propeller turbine with 0~8% camber variations. The results of output power, efficiency, and pressure distribution of the turbine are graphically depicted. The definition of camber refers to the NACA airfoil. The commercial finite element analysis (FEA) packages, ANSYS, and CFX are used in this study. The results revealed the performance characteristics on small-hydro turbine and suggested a highly efficient section shape of the runner.
Abstract
The aim of this paper is to examine the hydraulically optimized camber of a blade. Prior studies have tried to determine the sound method of design on small-hydro turbines. These have appeared to realize a reasonably efficient small-hydro turbine. Nonetheless, specific and accurate design data have not as yet been established for the shape of the runner blade. Hence, this study examines the performance characteristic of an axial propeller turbine with 0~8% camber variations. The results of output power, efficiency, and pressure distribution of the turbine are graphically depicted. The definition of camber refers to the NACA airfoil. The commercial finite element analysis (FEA) packages, ANSYS, and CFX are used in this study. The results revealed the performance characteristics on small-hydro turbine and suggested a highly efficient section shape of the runner.
참고문헌 (10)
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- Ultra Low-Head Propeller Turbines for Small Canal Drops, "Soundranayagam, S.", Indian Institute of Science, ~ (1988)
- Demetriades, G. M., "Design of Low-Cost Propeller Turbines for Standalone Micro-hydroelectric Generation Units", 박사, pp.1997
- Upadhyay, D., "Low Head Turbine Development using Computational Fluid Dynamics", 박사, pp.2004
- Simpson, R. G., "Application of Computational Fluid Dynamics to the Design of Pico Propeller Turbines", Proceedings of the International Conference on Renewable Energy for Developing Countries (2006)
- Alexander, K. V., "Axial-flow turbines for microhydro systems", Elsevier Journal of Renewable Energy, 34, pp.35~47 (2009)
- Singh, P., "Experimental optimization of a free vortex propeller runner for micro hydro application", Elsevier Journal of Experimental Thermal and Fluid Science, 33, pp.991~1002 (2009)
- Dixon, S. L., "Fluid Mechanics, Thermodynamics of Turbomachinery, Chapters 2, 6 and 9" (2005), Elsevier
- ANSYS Inc, "ANSYS CFX ver.13 User’s Guide", ~ (2011)
- Paik, N. C., "Performance Characteristics fo an Axial Propeller Small-hydro Turbine with Various Cambers fo Runner Blade", International Conference on Parallel Computational Fluid dynamics (2010)