摘要
引气自循环机匣是拓宽增压器压气机稳定工作范围的重要技术手段之一,为研究引气自循环机匣参数对压气机性能的影响,以某船用涡轮增压器离心式压气机为研究对象,采用数值模拟对引气自循环机匣结构的六个参数(回流槽轴向位置及宽度、抽吸槽轴向位置及宽度、旁通流道高度及宽度)不同取值下的模型进行仿真计算。结果表明:抽吸槽轴向位置及宽度对压气机性能影响较大,在相同质量流量下抽吸槽轴向所处位置到压气叶轮叶片前缘的距离越大压气机总压比越大。随着抽吸槽宽度的增大,压气机稳定运行范围先增大后减小,在抽吸槽宽度为0.062257R时达到最大稳定运行范围。
Self-recirculating bleed air casing is one of the critical technical approaches to broaden the stable operating range of turbocharger compressors.To investigate the influence of self-recirculating casing parameters on compressor performance,this study focuses on a marine turbocharger centrifugal compressor and employs numerical simulations to analyze models with varying values of six structural parameters:axial position and width of the recirculation slot,axial position and width of the suction slot,height and width of the bypass flow channel.The results indicate that the axial position and width of the suction slot significantly influence compressor performance.Specifically,under the same mass flow rate,a greater distance between the suction slot's axial position and the leading edge of the compressor impeller blades results in a higher total pressure ratio of the compressor.As the suction slot width increase s,the stable operating range of the compressor first expands and then contracts.The maximum stable operating range is achieved when the suction slot width is 0.062257R.
作者
朱群伟
徐涛
Zhu Qun-wei;Xu Tao(Haizhuang Guangzhou Bureau,Guangdong Guangzhou 510000)
出处
《内燃机与配件》
2025年第18期28-31,共4页
Internal Combustion Engine & Parts
关键词
压气机
引气自循环机匣
数值模拟
参数设计
Compressor
Bleed self-circulating casing
Numerical simulation
Parameter design
