Abstract: The Computational Fluid Dynamics(CFD)method was used to simulate the flow fields and calculate the separation efficiency of air-liquid spiral separators with different structural parameters.The RSM turbulent model (Reynolds Stress Model), which abandons the isotropic eddy-viscosity hypothesis, was used to analyze the highly swirling flow fields in spiral separators.Random Orbit Model was used to simulate the traces of liquid droplets in the whole flow field.Based on the simulation, the effects of helical pitch and screw number on the separating performance were studied, which was further tested and verified.The results showed that the Reynolds Stress Model predicted successfully the characteristics of the flow and the simulated performances were in good agreement with those obtained by tests.It should be feasible to design the spiral separators based on the method of Design by Numerical Analysis.

摘要： 应用计算流体力学（CFD）方法对不同结构参数的螺旋片导流式气液分离器在湍流状态下的流体流动场进行了数值模拟，研究了螺旋个数和螺距对螺旋片导流式气液分离器分离性能的影响，并与试验测定结果对比，由此验证基于数值模拟方法设计螺旋片导流式气液分离器分离效率的可行性与准确性.分析结果表明，数值模拟结果与试验数据基本一致，可以作为螺旋片导流式气液分离器设计的有效工具.