Numerical simulation on unsteady flow with turbulence intensity effects in a turbine stage

A two-dimensional Navier-Stokes equation was solved to predict unsteady flow and temperature fields with different turbulence intensity in a turbine stage. It is found that turbulence intensity has significant effects on the temperature distribution but the pressure distribution does not. When hot streak was introduced in the turbine's inlet, high turbulence intensity would make the temperature of hot gas diffuse more quickly, and the temperature distribution tend to be more uniform. The temperature discrepancy between suction surface and pressure surface of rotor would be decreased, and the temperature profile along the chord become more even.