中文摘要：

研究了水蒸气跨音速流动过程中的非平衡相变及凝结冲波现象，揭示了气动激波与非平衡凝结流动之间相互作用的非定常流动规律。采用欧拉形式的控制方程求解两相凝结流动，建立了二维可压缩守恒型计算模型对水蒸气跨音速非平衡流动进行了数值模拟．捕获到了凝结冲波现象，揭示了凝结冲波的非平衡热力学机理，并探讨了尺度效应对两相非平衡流动的影响。研究了凝结冲波与气动激波之间的不同热力学特性和形成机理，并探讨了气动激波与非平衡凝结流动之间相互作用的非定常流动规律。

英文摘要：

The transonic steam flow with non-equilibrium phase change and condensation wave was investigated, and the influence of the aerodynamic shock on the unsteady condensing flow was revealed in this paper. A conservation-type two-dimensional compressible numerical model, in which Eulerian multi-phase equations govern both the vapor and liquid phases, was developed. The numerical simulation for the homogeneous nucleation in high-speed transonic steam flow was performed using this model. And the non-equilibrium thermodynamic phenomenon such as condensation wave and the effects of the nozzle geometry on the unsteady flow was studied. The difference of the condensation wave and the aerodynamic shock was investigated, and the influence of the aerodynamic shock on the non-equillbrlum phase change was revealed.