车用轴向调节式可变喷嘴增压器涡轮流场分析  

Analysis of Turbine Field of Axial Adjustable Nozzle Turbocharger for Vehicle

作　　者：卢隆辉 张卫波[2] 刘建军[1,3,4] LU Longhui;ZHANG Weibo;LIU jianjun(School of Mechanical&Electronic Engineering,Sanming University,Sanming 365004,China;College of Mechanical Engineering and Automation,Fuzhou University,Fuzhou,350116,China;Fujian Province Engineering Research Center of Mechanical Modern Design&Manufacture,Sanming 365004,China;Collaborative Innovation Center of Green Casting-Forging Industry&High-End Parts,Sanming 365004,China)

机构地区：[1]三明学院机电工程学院,福建三明365004 [2]福州大学机械工程及自动化学院,福建福州350116 [3]机械现代设计制造技术福建省高校工程研究中心,福建三明365004 [4]绿色铸锻及高端零部件制造协同创新中心,福建三明365004

出　　处：《机械制造与自动化》2019年第6期47-50,共4页Machine Building & Automation

基　　金：福建省中青年教师教育科研项目(JAT170528);福建省科技厅自然科学基金项目(2016J01741)

摘　　要：以车用柴油机轴向调节式可变喷嘴增压器涡轮流场为研究对象,对增压器的不同工况进行试验,分析涡轮内部流场变化情况,研究高低速叶片对涡轮特性的影响。结果表明:完整气动叶型的低速叶片涡轮膨胀比大,气体的动能变化大,激波现象明显,有利于提高涡轮效率;不完整气动叶型的高速叶片工作时,使大流量气体能够快速通过涡轮区域,能量变化较平缓,膨胀比小,叶轮间隙处有明显泄漏现象,影响涡轮输出功率持续提高。The turbine field of axial adjustable turbocharger of diesel engine for vehicle is studied,its operation in different working conditions is tested,the change of the internal field of the turbine is analyzed and the influence of high and slow speed blades on the flow field characteristics is stadied.The results show that the whole pneumatic type of low-speed blade can be used to improve the expansion ratio,quickly change the kinetic energy and be the obvious shock-wave phenomena,thus improving the turbine efficiency;the incomplete pneumatic type of high-speed blade makes the mass of gas pass through the area of turbine quickly,thus transforming the energy smoothly,but some gas separation phenomenon appears in the turbine clearance,it affects the continuous improvement of the turbine output power.

关 键 词：车用柴油机 可变喷嘴增压器 喷嘴叶片 涡轮 流场 

分 类 号：TK421.8[动力工程及工程热物理—动力机械及工程]