中文摘要：

建立了二维可压缩守恒型计算模型对水蒸气超音速非平衡流动进行了数值模拟，捕获到超音速流动过程中的非平衡相变及激波现象，探讨了蒸汽饱和度、Wilson点压强、粒径分布、成核率等热力学参数之间的相关性，揭示了水蒸气超音速流动中非平衡相变的凝结特性。

英文摘要：

The supersonic non-equilibrium steam flow with spontaneous condensation was numeri- cally studied base on the conservation-type two-dimensional numerical model. The non-equilibrium thermodynamic phenomenons such as the spontaneous condensation and the shock effect were investigated. The interaction effect of the super saturation ratio, the pressure value at the Wilson point, the droplet radius, the nucleation rate were studied. The thermodynamic characteristic of the non-equilibrium phase change of in the supersonic steam flow was revealed.