汽轮机湿蒸汽两相凝结流动数值研究的现状与进展

着重针对汽轮机中存在自发凝结的湿蒸汽两相流动 ,论述了湿蒸汽两相流动数值研究进展现状及其待解决的问题 ,以期对此方面的研究及其工程应用起到促进作用。文中结合作者目前进行的有关湿蒸汽两相凝结流动数值研究 ,对湿蒸汽透平级中两相流动的数值模型、求解方法等关键问题进行了阐述和探讨 ,给出了作者对一维喷管、二维喷管以及叶栅进行数值模拟的部分算例结果 ,以说明所发展的数值模拟方法的可行性和准确程度。

Status and Progress in Numerical Researches on Wet Steam Two-Phase Condensing Flows in Steam Turbines

Aiming at wet steam two-phase flow with spontaneous condensation in steam turbine, the present paper describes the status and progress in the numerical research area of wet steam two-phase flows and their problems to be solved. Based on the numerical study of wet steam two-phase flows being conducted by the authors recently, the numerical models, methods, and other key problems of two-phase flows in wet steam turbine/stage are discussed in detail. Some numerical results form the simulation of transonic two phase flows with spontaneous condensation in a 1-D nozzle, a 2-D nozzle, and a cascade of turbine rotor tip section are presented and compared with the experimental results, in order to show the feasibility and accuracy of the numerical approaches developed by the authors.