Measured wetness of saturated steam plays an important role in the thermal efficiency and safety of condensing turbine. 湿蒸汽参数的准确测量，对汽轮机的经济性和安全性具有重大意义。
Due to the effects of inertia and diffusion, the droplets impact to the blades and deposit on the blade surface to form water film, when the wet steam flows in cascade passage. 湿蒸汽在叶栅通道内运动时，由于惯性和扩散作用，水滴会撞击并沉积在叶片表面上，形成水膜。
Steam is superheated by being heated above the temperature of saturated steam. 蒸汽被加热到饱和蒸汽的温度以上使之过热。
