废气涡轮增压器压气机流场特性分析  

Analysis on flow-field characteristics of exhaust gas turbocharger compressor

作　　者：刘克铭[1] 李弘焘 李国威[1] 袁鑫 戴羽森 蔡琳滢 LIU Keming;LI Hongtao;LI Guowei;YUAN Xin;DAI Yusen;CAI Linying(School of Mechanical Engineering,Liaoning Technology University,Fuxin 123032)

机构地区：[1]辽宁工程技术大学机械工程学院,辽宁阜新123032

出　　处：《机械设计》2024年第7期106-113,共8页Journal of Machine Design

基　　金：国家自然科学基金资助项目(51405213)。

摘　　要：为提高某废气涡轮增压器工作性能,文中对压气机流场特性进行理论与试验研究,通过Fluent软件对不同工况下压气机的性能参数进行仿真,得到流体的压强、流速和温度云图,通过增压器性能试验测试压气机流量、效率及压比,并对压气机进行结构优化。结果表明:仿真结果与试验结果相对误差小于5%,结构优化后的压气机叶轮对流力的利用率提高32.8%,流场压力极值增大5.83%,蜗壳割舌部位压力集中减弱,蜗壳背部最大流速降低2.89%,最高温度提高20.06%,为增压器压气机结构的进一步优化提供依据。In this article,in order to improve the exhaust gas turbocharger’s working performance,the compressor’s flowfield characteristics are explored theoretically and experimentally.The performance parameters of the compressor under different working conditions are simulated by means of the Fluent software;such factors as fluid pressure,flow rate and temperature nephogram are worked out.The compressor’s flow,efficiency and pressure ratio are measured through the experiment of turbocharger performance experiment,and its structure is optimized.The results show that the error between the simulation results and the experimental results is less than 5%;the utilization rate of the convective force on the optimized compressor impeller increases by 32.8%;the extreme value of the flow-field pressure increases by 5.83%.In addition,the pressure concentration at the volute’s cutting tongue has weakened;the maximum flow velocity at the volute’s back decreases by 2.89%,while the maximum temperature increases by 20.06%.This study provides basis for further structural optimization of such turbocharger compressors.

关 键 词：增压器 压气机 流场特性 结构优化 

分 类 号：U464.135.2[机械工程—车辆工程]