Numerical Simulation on Secondary Flow of Turbine Stator Cascade with a Large Turn Angle

Three dimensional flow field of turbine stator cascade with a large turn angle was simulated.The aerodynamics characteristic and secondary flow of cross section along streamwise were analyzed.The result shows that the intensity of secondary flow moving from pressure side to suction side enhances gradually through flow direction.It aggregates the boundary layer of the end-wall near stator suction and makes it roll up at the rear stator,and leads the acute fluctuation of the pressure loss coefficient and outlet flow angle along the span.By comparison of different stator height,it is found that the decrease of stator height will enlarge the secondary flow zone within blade height area and will greatly aggravate the stator secondary flow.