中文摘要：

在欧拉-欧拉两相流模型的基础上，加载群体平衡模型，采用分组法对汽轮机喷嘴内部盐析两相流场进行数值模拟，得到了沿介质流动方向不同物质盐沉积颗粒平均粒径的分布特性，预测了汽轮机喷嘴内汽固两相流不同物质盐沉积颗粒的分布规律。计算结果表明：在喷嘴的流道内，沿介质的流动方向，不同盐沉积颗粒的平均粒径均呈现逐渐增大趋势，主流区盐沉积颗粒平均粒径较小，近壁面处盐沉积颗粒平均粒径较大。此外，受相间传质及颗粒微观行为影响，沿介质的流动方向，小粒径颗粒的组分数分布逐渐减小，大粒径颗粒组分数分布逐渐增大。不同物质盐沉积颗粒平均粒径和颗粒组分数的分布，在喷嘴流场内变化是不同的。

英文摘要：

A population balance model has been incorporated with the euler-euler model based on Fluent code to simulate the two phase flow with salt deposits behaviors in a steam turbine nozzle by the method of grouping, Obtained along the flow direction of medium the different material salt deposits the distribution of average particle size distribution characteristics, Predicting the solid two phase flow in steam turbine nozzle is salt deposits distribution regularity of different substances. The calculation results show that the nozzle flow passage, along the flow direction of medium, different salt deposits of all showed a trend of gradual increase in the mean particle size, the mainstream area of salt deposition particles smaller mean particle size,close to the wall is salt deposition, mean grain size is larger, In addition, affected by the interphase mass transfer and micro particle behavior, along the flow direction of medium and small size particles decreases of group distribution, large diameter of particle group distribution increased gradually. Different kinds of material of salt deposition fraction, the distribution of average particle size and particle group, change is different from the nozzle flow field.