对大尺寸的工业级旋风分离器在高压下的气液分离过程进行了研究，运用数值模拟的方法研究了高压工况下旋风分离器内部流场分布。同时对结构进行改进，在旋风分离器内的不同位置设置多孔板以及在进气口位置设置挡板，比较结构改进前后分离性能的变化。模拟结果表明，对称入口有利于流场对称分布，在分离器内设置多孔板和进口挡板均能提高分离效率，综合改进后的旋风分离器在不增加分离器的压力损失前提下，能完全分离粒径大于5 μm的液滴，对于小于5 μm的液滴分离效率比传统分离器提高了24.60%。

The gas-liquid separation under high pressure is studied by a large-scale industrial cyclone separator and numerical simulation method is used to analyze the flow field distribution within cyclone separator under high pressure.The structure of cyclone separator is modified through arranging perforated plates at different positions in the cyclone separator and installing a baffle at the inlet position.The separation performances before and after arranging perforated plate are compared.The simulation results show that the symmetrical inlets facilitate the symmetrical distribution of the flow field.Perforated plates and baffle both can improve the separation efficiency in the separator.After a comprehensive improvement,the cyclone separator can separate completely the droplets with particle size larger than 5 μm without increasing pressure loss of the separator,and the separation efficiency of the droplets with particle size less than 5 μm increases 24.60%.