摘要
采用数值模拟方法对离心压气机叶片尾缘宽度进行多方案设计与优化,详细分析叶片尾缘宽度对压气机性能影响规律及叶轮内部流动特征,并对优化前后结果进行对比。研究结果表明:尾缘叶片宽度在不同压气机转速下对压气机性能有不同的影响,在设计工况下,尾缘叶片宽度优化后可使压比提升2.19%,效率提升0.59%,两种宽度叶片的性能差距随转速的变化而变化。尾缘宽度优化后可以增大各转速下的阻塞区流量,增加压气机工作流量范围;优化后压气机最高压比提升1.5%~3.21%,最高效率提升0.75%~1.75%,在中高转速区域性能提升更为明显。
The multi-scheme design and optimization of blade trailing edge width for centrifugal compressor was carried out by numerical simulation method.The influencing law of blade trailing edge width on compressor performance and the internal flow characteristics of impeller are analyzed in detail,and the results before and after optimization were compared.The results show that the trailing edge blade width has different effects on the compressor performance at different compressor speeds.Under the design condition,the modified trailing edge blade width can increase the pressure ratio by 2.19%and the efficiency by 0.59%,the performance gap between the two width blades changes with the change of speed.The optimized trailing edge width can also increase the flow in the blocking area of each speed,broadening the range of compressor working flow.After optimization,the maximum pressure ratios increase by 1.5%-3.21%and the maximum efficiency increases by 0.75%-1.75%with a more pronounced performance improvement in the medium and high speed region.
作者
吕柏苍
李颂
冯建增
丁开放
王永青
LYU Baicang;LI Song;FENG Jianzeng;DING Kaifang;WANG Yongqing(School of Automobile and Traffic Engineering,Liaoning University of Technology,Jinzhou 121000,China;School of Mechanical Engineering,Liaoning Technical University,Fuxin 123000,China;Datong North Tianli Supercharging Technology Co.,Ltd.,Datong 037036,China)
出处
《车用发动机》
北大核心
2026年第1期25-33,40,共10页
Vehicle Engine
基金
辽宁省教育厅科学技术研究面上项目“车辆动力机械增压系统补气引流机理研究”(JYTMS20230844)。
关键词
离心压气机
数值模拟
叶片尾缘宽度
压气机性能
centrifugal compressor
numerical simulation
blade trailing edge width
compressor performance
