为研究不同吞雨条件下雨滴的运动形式以及各级压气机的性能变化特点，以某三级压气机为研究对象，使用CFX软件进行数值模拟，选择k-ε湍流模型，针对压气机干压缩、整周均匀吞雨和周向非均匀吞雨3种不同工况，对比分析雨水对压气机流场和性能的影响机理。结果表明：雨滴和空气之间的粘性力引起的额外流动损失以及雨滴的蒸发效果在各级压气机内存在差异，雨水在进口局部区域浓度较大将导致流场沿周向分布不均匀；相比于均匀吞雨，多级压气机非均匀吞雨工况下整机性能下降幅度增大，稳定工作范围进一步减小；雨滴的蒸发强度沿流动方向逐渐增大，因此前两级工作特性变化情况与整机较为一致，而第3级在部分工况点的效率略有升高。

To investigate the movement of raindrops and the performance change characteristics of each stage in different rain injection condition,a threestage compressor is researched for numerical simulation by CFX,meanwhile using k-ε turbulence model.The impact mechanism of rain on compressor flow field and performance by raindrops distribution form was compared and analyzed,which based on three different working conditions of compressor:dry compression,uniform rain ingestion on the whole week and nonuniform rain ingestion in the circumferential direction.The results show that,the additional flow loss caused by speed slip between raindrops and air and evaporation effect of raindrops are different at each stage,The more concentrated form of rain in the local area will lead to the uneven circumferential distribution of the flow field.Compared with the uniform rain ingestion condition,the performance of the multistage compressor decreases more seriously and the stable operating margin decreases further under the nonuniform rain ingestion condition.The evaporation strength of raindrops increase along the flow direction gradually,the variation of performance at the first and second stage is consistent with the whole compressor,but the efficiency increases on some working points at the third stage.

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国家科技重大专项(2017-II-0006-0019，2017-I-0009-0010)；国家自然科学基金(52006042)；黑龙江省博士后面上基金(LBH-Z20126)