Novel Flow Control Method for Vortex Shedding of Turbine Blade
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概要
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Three-dimensional flow simulations through a turbine cascade were carried out for an exit isentropic Mach number of 0.79 and a Reynolds number of 2.8×106. The main objective is to increase the base pressure. Calculations were carried out using an in-house numerical code, where a 2nd order Roe’s flux-difference splitting for inviscid numerical fluxes, a 2nd order implicit dual time method for time integration, and Delayed Detached Eddy Simulation for turbulence were employed. The present idea to increase the base pressure is to connect the pressure and suction sides of the blade using microtubes distributed uniformly along the span on the trailing edge. Simulated results show that this modification does not affect the blade load, increases the base pressure by 0.7%, and decreases the overall loss by 3%.
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