普朗特-迈耶流中湿空气非平衡凝结影响的研究  

Influences of the non-equilibrium condensation of moist air on Prandtl-Meyer flows

作　　者：孙秀玲[1] 李亮[1] 马晓永[2] 李国君[1] 

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049 [2]中国空气动力研究与发展中心,四川绵阳621000

出　　处：《空气动力学学报》2013年第4期425-429,448,共6页Acta Aerodynamica Sinica

基　　金：中央高校基本科研业务费专项基金(XJJ20100071)

摘　　要：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。Prandtl-Meyer flow is one kind of basic flow important for the design of aircraft.A numerical method is developed to solve the moist air flows with non-equilibrium condensation.The Prandtl-Meyer flows around 90°and 40°angles of sharp corners are numerically simulated at oncoming moist air flow conditions,and compared with experimental measurements.For the 90°angle of sharp corner,the predicted static pressure distribution is well agreed with the experimental data.For the 40°angle of sharp corner,the density distribution is in good agreement with the measured values.With the increased relative humidity of oncoming flow,the onset condensation position moves upstream and the maximum nucleation rate decrease.The nonequilibrium condensation of moist air leads to obvious variations of the distribution of pressure,Mach number and temperature etc.

关 键 词：普朗特-迈耶流 湿空气 非平衡凝结 数值研究 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]