尾缘自由掠叶型跨声速离心压气机叶轮流动特性

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《内燃机学报》[ISSN:1006-6977/CN:61-1281/TN]

Title:: Flow Characteristic of Transonic Centrifugal Compressor Impeller with Free-Form Sweep at Leading and Trailing Edges

作者:: 田红艳; 佟鼎; 张俊跃; 程江华; 刘欣源; 1.河北工业大学机械工程学院，天津300130； 2.中国北方发动机研究所柴油机增压技术重点实验室，天津300400

Author(s):: Tian Hongyan; Tong Ding; Zhang Junyue; Cheng Jianghua; Liu Xinyuan; 1. School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China;2. National Key Laboratory of Diesel Engine Turbocharging Technology, China North Engine Research Institute, Tianjin 300400, China

Keywords:: transonic centrifugal compressor; free-form sweep; numerical simulation; bench test

摘要:: 针对某跨声速离心压气机叶轮，对其前/尾缘叶型进行了自由掠叶型的改进，并开展了相应的数值分析和试验验证，结果表明：在全转速范围内，离心叶轮前缘采用前自由掠叶型能够使叶轮更加适应进口的跨声速流动，有效改善叶轮进口的激波形态，增大堵塞流量，降低激波损失，增加效率.尾缘采用后自由掠叶型能够增加出口叶片的做功面积，抑制叶片尾缘间隙流动与主流结合形成的低能流团，从而使压比和稳定性提升.最后，针对设计的前/尾缘自由掠叶型跨声速离心压气机叶轮，开展了台架性能试验，验证了仿真分析结果.

Abstract:: Abstract: The free-form sweep method was used to improve the leading and trailing edges of blade on a transonic centrifugal compressor impeller, and corresponding numerical simulation and bench test were also carried out. The results show that in full speed range, the front free-sweep at the leading edge of the blade makes the impeller more suitable for the transonic flow at the inlet, which effectively improves the shape of shock wave. Additionally, the front free-sweep at the leading edge also increases the chock flow rate, reduces the shock loss and improves the efficiency of the centrifugal compressor. On the other hand, the free-sweep at trailing edge can increase the work area of the blade outlet, which reduces the low-energy flow structure formed by the combination of trailing edge clearance flow and the mainstream flow separation and leads to an increase of the pressure ratio and a stability improvement of the compressor. In the end, manufactured and then tested on a compressor test bench. It is found that the numerical results agrees well to the test results.

[1]汪陈芳,张扬军,诸葛伟林,等.基于流场偏差分析的离心压气机优化设计[J].内燃机学报,2015,(04):378.
[2]朱清淋,老大中,王磊磊,等.离心压气机轮缘压力及间隙泄漏非轴对称现象研究[J].内燃机学报,2016,(05):463.
　ZHU Qing-lin,LAO Da-zhong,WANG Lei-lei,et al.on-axisymmetric Phenomenon of Shroud Pressure and Tip Leakage in the Centrifugal Compressor[J].,2016,(06):463.
[3]李文娇,杜礼明,关天民.一种新型叶片扩压器的联合处理方法[J].内燃机学报,2023,(02):175.
　Li Wenjiao,Du Liming,Guan Tianmin.Combined Treatment Method of a New Type Vane Diffuser[J].,2023,(06):175.
[4]田红艳,侯康,佟鼎,等.离心压气机叶片式机匣拓稳流动特性[J].内燃机学报,2023,(04):361.
　Tian Hongyan,Hou Kang,Tong Ding,et al.Stabilizing Flow Characteristics of a Centrifugal Compressor with Vane Casing Treatment[J].,2023,(06):361.

更新日期/Last Update: 2021-11-25