中文摘要：

采用计算流体力学CFD方法（computational fluid dynamics）并结合汽轮机静叶栅处实际运行参数对静叶栅表面颗粒的沉积特性进行数值模拟研究。模拟计算基于三维定常不可压缩流体的Ⅳ一5方程，在连续相流场的基础上引入离散相模型DPM（discrete phase model），并忽略盐类析出的化学过程，对流场内固体颗粒的沉积轨迹及在叶片表面的沉积率进行数值模拟。模拟结果表明：汽轮机静叶栅处的沉积部位主要位于压力面的尾缘处，且随着颗粒直径的变大，沉积率变大，同时在压力面处的沉积范围也增大；随着颗粒质量流量增大，沉积率增大，但是沉积范围没有变化。

英文摘要：

In this paper, the study of numerical simulation had been done the characteristics of salt deposit on static cascade by using the computational fluid dynamics （ CFD ） method and the actual flow field parameters of static cascade of high pressure in steam turbine. Simulation calculation which was based on the Navier-Stokes equations of three-dimensional steady incompressible fluid introduced the discrete phase model （DPM） on the basis of the primary flow field, ignored the deposition process of chemical action and performed the numerical simulation for the deposition of solid particles trajectory in the flow field and the deposition rate on the surface of the turbine blade. The simulation results show that deposition area of static cascade are mainly located at the trailing edge of the pressure surface, moreover, the deposition rate and the deposition area increase as the larger of the particle diameter. Meanwhile, the deposition rate also increases as the mass flow of particle increases, while there is no obvious change in deposition area under the circumstances.