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普朗特-迈耶流是飞行器设计过程中一种重要的基本流动。本文发展了求解湿空气非平衡凝结流动的数值方法,对凸角分别为90°和40°的湿空气来流条件下的普朗特-迈耶流动进行了数值模拟,并且与试验结果进行了对比。90°凸角时,膨胀扇内静压分布的计算值与试验结果吻合良好。40°凸角时,膨胀扇内密度的计算值与试验值吻合良好;随着来流相对湿度的增加,凝结起始位置向上游移动而最大成核率减小。膨胀扇内的湿空气非平衡凝结显著改变了压力、马赫数、温度等参数的分布。
Plan-Meier flow is an important basic flow in aircraft design. In this paper, a numerical method to solve the non-equilibrium condensation flow in wet air is developed. The Prandtl-Meyer flow under wet air flow with the lobe angles of 90 ° and 40 ° respectively is numerically simulated and compared with the experimental results Compared. At 90 ° lobe, the calculated static pressure distribution in the expansion fan is in good agreement with the experimental results. At 40 ° lobe, the calculated density of expansion fan is in good agreement with the experimental value. With the increase of relative humidity, the initial position of condensation moves upstream and the maximum nucleation rate decreases. The non-equilibrium condensation of moist air in the expansion fan significantly changes the distribution of parameters such as pressure, Mach number and temperature.