Unsteady numerical study on steam spontaneous condensation in a turbine cascade

Steam turbine is important in energy industry, but two-phase flow affects its security and efficiency. The paper numerically studies on a turbine´s wet steam cascade and counts the variation of wet steam parameter in the cascade. The parameter variants in a periodic time when a rotor passes through a stator tube. The wet steam parameter catastrophic fluctuates at stator casing face outlet, rotor casing face inlet and hub face outlet. Especially at rotor casing face inlet, it meets the fact of operation. So when designing and manufacturing cascades, the problem should be considerated.