湿空气非平衡凝结对压气机叶栅性能影响的数值研究  

Numerical study of the effects of moist air with non-equilibrium condensation on the compressor cascade

作　　者：孙秀玲[1] 张慧梅[1] 杨利民 

机构地区：[1]西安科技大学,西安710054 [2]陕西省建筑科学研究院,西安710082

出　　处：《应用力学学报》2016年第2期241-246,370,共6页Chinese Journal of Applied Mechanics

基　　金：西安科技大学博士启动金(2014QDJ012);西安科技大学培育基金(201345)

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,凝结潜热与跨音速气流耦合会显著改变流场结构。本文建立了湿空气非平衡凝结流动的数学物理模型,对三种工况下压气机叶栅内湿空气凝结流动进行计算分析。计算结果表明:湿空气压气机叶栅流动中,湿空气中水蒸气有可能发生非平衡凝结从而对叶栅通道内的流动产生强烈影响,改变流场内的激波结构,叶栅内压力系数减小最大幅度由1.38减小到0.76。In transonic flow, fast 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. A numerical model of moist air flow with non-equilibrium condensation is established. Numerical simulations are implemented to investigate the internal flow of compressor cascade at various Mach numbers and the inlet flow angles by this model. Results show that the non-equilibrium condensation in moist air flow may occur in compressor cascade, thus the shock wave structure are significantly changed and the biggest decrease ranges of the pressure coefficient is from 1.38 to 0.76.

关 键 词：跨音速流动 湿空气 非平衡凝结 数值研究 叶栅 

分 类 号：O354.6[理学—流体力学]