高速离心式压气机喘振特性的实验与数值模拟研究  

Experimental and Numerical Simulation Study on Surge Characteristics of High Speed Centrifugal Compressor

作　　者：孙立臣 席光[1] 武耀族 SUN Lichen;XI Guang;WU Yaozu(School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《工程热物理学报》2023年第6期1519-1527,共9页Journal of Engineering Thermophysics

基　　金：国家重大专项基础研究项目(No.2017-II-0002-0014)。

摘　　要：利用实验与数值模拟结合的方法对高速离心式压气机进行喘振特性研究。实验通过调节压气机出口管道流量调节阀实现压气机从平稳工况到喘振的动态过程。实验发现,喘振阶段叶轮轮盖动态压力及叶轮进口附近气流速度会受到失速团的影响在单个周期增长阶段产生剧烈高频震荡,安装叶片扩压器时,压气机性能曲线较无叶扩压器时大幅度左移,且两种情况下压气机喘振频率等相差较大。同时建立全流道数值模型,采用气腔模型对深喘进行模拟预测,减少气腔容积,压气机喘振频率和压力振荡幅值均增加,但增加幅度逐渐减小。Experimental and numerical simulation research on surge characteristics of high-speed centrifugal compressor had been carried on.The dynamic process of the compressor from steady state to surge was realized by adjusting the flow control valve of the outlet pipe of the compressor.It was found that the dynamic pressure in the impeller cover and the air velocity near the impeller inlet would be affected by the stall cells,and a violent high-frequency oscillation would occur in the growth stage.When the vaned diffuser was installed,the compressor performance curve will move to the left significantly compared with that with the vaneless diffuser,and the surge frequency of the compressor in the two cases is quite different.At the same time,a full channel numerical model was established,and the deep surge was simulated and predicted by the plenum chamber model.While reduced the volume of the plenum chamber,the surge frequency and pressure oscillation amplitude of the compressor were increased,but the growth rate decreased.

关 键 词：离心压气机 喘振实验 叶片扩压器 无叶扩压器 数值模拟 

分 类 号：TH452[机械工程—机械制造及自动化]