Abstract: In order to investigate how the separation efficiency of the inertial inlet particle separator(IPS)changes，the experimental study was conducted for three-dimensional structure model of two different inertial particle separators with different profiles. The effects on separator performance were obtained under the conditions of different mainstream flow，different scavenge ratio(SCR)，different inlet Mach number，different concentration of sands and different interval of the separator. The results show that for the different diameters of sands，the separation efficiency of the two models decreases when the mainstream flow increases，and under the condition of the same mainstream flow，the separation performance of the model with profile changing gently is much better than that of the model with profile changing rapidly. The separation efficiency of the two models increases then decreases when SCR increases，and this law is irrelevant to the diameter of sands. With the inlet Mach number increases，the separation efficiency of the two models slightly reduces，but the difference of the separation efficiency between the two models is significant under the same inlet Mach number，the maximum meets 6.54%. The concentration of sands has less impact on the separation efficiency of IPS when using C sands. And the separation efficiency of IPS increases with different degree when the axial spacing or the interval of the radial deviation decreases.

Key words: Particle separator；Separation efficiency；Scavenge ratio；Inlet Mach number；Profile curvature；Particle

摘要： 为了探索整体式进气粒子分离器(IPS)分离效率的变化规律，针对两种具有不同型面曲率的整体式粒子分离器的三维结构模型开展试验，重点研究了主流路流量、扫气比(SCR)、进口马赫数、进口砂粒浓度和分离器间距对粒子分离器性能的影响规律。实验结果表明:(1)对于不同粒径砂粒，两种模型分离效率均出现随着主流路流量增大而减小的趋势，其中在主流路流量相同的情况下，型面变化平缓的模型分离性能要优于型面变化剧烈的模型；(2)两种整体式粒子分离器模型的分离效率均随扫气比的增大呈现先增大后减小的变化，且这种规律与砂粒粒径无关；(3)随着进口马赫数的增大，两种整体式粒子分离器模型分离效率均仅出现小幅度减小，但在同一进口马赫数下，两种模型分离效率差异显著，最大达到6.54%；(4)采用C级砂时，可以认为粒子浓度对粒子分离器的分离效率没有影响；(5)当分离器轴向间距减小或径向偏离轴线间距减小时，粒子分离器模型的分离效率将出现不同幅度增大。

关键词: 粒子分离器； 分离效率； 扫气比； 进口马赫数； 型面曲率； 粒子