针对航行非均匀吞雨条件对航空发动机性能的影响，研究了吞雨条件对涡轴发动机粒子分离器性能的影响规律。考虑雨滴与空气之间气动破碎的物理现象，采用欧拉-拉格朗日多相流颗粒追踪模型，分析了吞雨量、吞雨粒径及非均匀吞雨条件对粒子分离器气动性能的影响。结果表明：吞雨量为0~8%时，粒子分离器扫气比增加11.34%、总压损失系数增加0.36%、总压畸变度减小0.328%、分离效率增加4.2%；吞雨量的增大，在引起较大的总压损失的同时也带来了较大的分离效率和较小的出口流场畸变；吞雨粒径为50~500 μm时，粒子分离器扫气比减小9.78%、总压损失系数减小0.09%、总压畸变度增加0.028%、分离效率增加5.27%；吞雨粒径的增大，在以粒子分离器出口流场畸变增大为代价的条件下，获得了较小的总压损失和较大的分离效率；非均匀吞雨时，粒子分离器扫气比减小0.92%、总压损失系数增加0.004%，总压畸变度增加0.054%，分离效率增加1.61%；非均匀吞雨带来了更大的总压损失和出口流场畸变，以此得到较大的分离效率。

Aiming at the influence of aviation nonuniformity rain swallowing condition on the performance of aeroengine, it was emphatically investigated that the influence rule of rain swallowing condition on the performance of particle separator in a turboshaft engine. Considered the physical phenomenon of pneumatic broken between rain drop and air, EulerianLagrangian multiphase flow model was used to analyze the influence of rain swallowing ratio, rain partical diameter and nonuniformity rain swallowing condition on the aerodynamic performance of particle separator. Results show that scavenging ratio increases by 11.34%, total pressure loss coefficient increases by 0.36%, total pressure distortion decreases by 0.328% and separation efficiency increases by 4.2% with rain swallowing ratio from 0 to 8%; the increase of rain swallowing causes the higher separation efficiency and the lower outlet flow field distortion meanwhile the higher total pressure loss coefficient; there are 9.78% decrease in scavenging ratio of particle seperator, 0.09% decrease in total pressure loss coefficient, 0.028% increase in total pressure distortion and 5.27% increase in separation efficiency with rain partical diameter from 50 to 500 μm; under the condition that the flow field distortion at the outlet of particle separator increases, the total pressure loss coefficient is lower and separation efficiency is higher with the increase of rain partical diameter; scavenging ratio decreases by 0.92%, total pressure loss coefficient increases by 0.004%, total pressure distortion increases by 0.054% and separation efficiency increases by 1.61% under the condition of nonuniformity rain swallowing; the condition of nonuniformity rain swallowing results in higher total pressure loss coefficient and higher outlet flow field distortion, which leads to greater separation efficiency.

V231.1

广东省基础与应用基础研究基金项目（2023A1515011597）