跨音速湿空气非平衡凝结流动的数值研究  

Numerical study on transonic flow of moist air with non-equilibrium condensation

作　　者：孙秀玲[1] 李亮[1] 吴联为[1] 李国君[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《应用力学学报》2011年第5期493-498,555,共6页Chinese Journal of Applied Mechanics

摘　　要：跨音速流动条件下湿空气中的水蒸气由于快速膨胀而发生非平衡凝结,凝结潜热对跨音速气流进行加热,会显著改变气流的流动特性。通过对商用计算流体动力学软件FLUENT进行二次开发,建立了湿空气非平衡凝结流动的数值求解方法。该方法可用于二维或三维、粘性或无粘、内流或外流的求解中。采用该方法分别对缩放喷管、透平叶栅以及绕CA-0.1圆弧翼型的湿空气非平衡凝结流动进行了数值分析。计算结果表明:湿空气凝结引起缩放喷管中的凝结激波、导致叶栅流动中总压降低;对于翼型周围的流动,在相对湿度分别为50%、57.1%、64.1%时,依次计算得到了单激波、λ激波、双激波。In transonic flow rapid expansion of water vapor contained in moist air leads to non-equilibrium condensation.The addition of latent heat to moist air can obviously change the behavior of transonic flow.Based on the commercial computational fluid dynamics software FLUENT,a new algorithm is developed to simulate the moist air flow with non-equilibrium condensation.It can be used to solve two-dimensional or three dimensional,viscous or inviscid,internal or external flows.Numerical simulations are conducted to investigate the moist air flows in a convergent-divergent nozzle,in a turbine cascade,and around the CA-0.1 circular arc airfoil respectively.The results show that the non-equilibrium condensation in moist air flow can lead to condensation shock in convergent-divergent nozzle,decrease the total pressure in turbine cascade,and ordinary shock,λ-shock,steady double shock are observed in the case of airfoil flow at the relatively humidity of 50%,57.1% and 64.1% respectively.

关 键 词：跨音速流动 湿空气 非平衡凝结 数值研究 喷管 透平叶栅 翼型 

分 类 号：O354.6[理学—流体力学]