Two dimensional steady/unsteady numerical simulation in a turbine stage

Two-dimensional Navier-Stokes equation was solved to process steady and unsteady simulation for a turbine stage. Comparing the results of two analysis methods, the pressure distributions obtained by two methods on the stator surface are almost same, but the discrepancy of pressure distributions on the rotor surface can be clearly seen, especially in the condition of small gap between stator and rotor. The steady results are approaching the time averaged results of unsteady method when the gap becomes large.