Numerical investigation on shock wave interaction in a turbine cascade

Interaction process of condensation shock and aerodynamic shock in superheated steam flow and nucleation flow with different exit Mach number was numerically studied. The model was implemented within a full N-S viscous flow solution procedure, and the process of condensation was calculated by the quadrature method of moments. Numerical schlieren photography was performed to show the shock wave distribution in cascade. The boundary layer separation caused by Shockwave reflection on suction side and nucleation were showed and the caused losses is discussed. The numerical result shows condensation shock would change the strength of shock wave and flow angle in cascade, and reduce the boundary layer separation caused by shock wave reflection on suction side, enhance the strength of wake, and affect the related losses.