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Numerical Study on Three-Dimensional Endwall Flow Characteristics within a Turbine Cascade Passage  

Myong Hyon Kook (국민대 기계자동차공학부)
Publication Information
Journal of computational fluids engineering / v.8, no.2, 2003 , pp. 49-56 More about this Journal
Abstract
Three-dimensional endwall flow within a linear cascade passage of high performance turbine blade is simulated with a 3-D Navier-Stokes CFD code (MOSA3D), which is based on body-fitted coordinate system, pressure-correction and finite volume method. The endwall flow characteristics, including the development and generation of horseshoe vortex, passage vortex, etc. are clearly simulated, consistent with the generally known tendency. The effects of both turbulence model and convective differencing scheme on the prediction performance of endwall flow are systematically analyzed in the present paper. The convective scheme is found to have stronger effect than the turbulence model on the prediction performance of endwall flow. The present simulation result also indicates that the suction leg of the horseshoe vortex continues on the suction side until it reaches the trailing edge.
Keywords
CFD; Turbine cascade; Secondary Flow; Horseshoe Vortex; Passage Vortex;
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