增压器涡轮端热边界对流场仿真的影响  

Influence of Turbine End Thermal Boundary for Turbocharger on Flow Field Simulation

作　　者：尹川川 倪计民[1] 金文华[1] YIN Chuanchuan;NI Jimin;JIN Wenhua(School of Automotive Studies,Tongji University,Shanghai 201804,China)

机构地区：[1]同济大学汽车学院

出　　处：《车用发动机》2019年第6期7-14,共8页Vehicle Engine

摘　　要：以某涡轮增压器涡轮端为研究对象,采用仿真与试验相结合的方法来研究涡轮增压器涡轮端流场,通过建立增压器三维几何模型,抽取出流体域进行流场仿真计算。设置3种不同的热边界条件探究其对涡轮端流体域温度场、压力场和速度场仿真计算结果的影响和对效率计算结果的影响。针对仿真计算结果设计涡轮增压器热吹试验进行验证,并通过试验研究涡轮端温度场的瞬态变化规律,以及进气温度和流量对涡轮端温度场的影响。分析发现,采用全部共轭传热能够更准确地计算涡轮端流体域的温度场以及涡轮增压器的效率,计算误差在5%以内,而采用非共轭以及部分共轭误差较大。Taking a turbocharger turbine end as the research object,a combination of simulation and test was used to study the turbine end flow field of turbocharger.By establishing a 3D geometric model of turbocharger,the fluid domain was extracted and the flow field simulation calculation was conducted.Three kinds of thermal boundary conditions were set to investigate the influence of thermal boundary conditions on the simulation results of temperature,pressure and velocity field and explore its effect on the results of efficiency calculation.The turbocharger hot-blowing test was further designed to verify the simulation results and the transient variation laws of temperature field at turbine end and the influences of intake air temperature and flow rate on it were studied.The analysis found that the full conjugate heat transfer could calculate the temperature field of turbine end fluid domain and the efficiency of turbocharger more accurately and the calculation error was less than 5%.In addition,the non-conjugate and partial conjugate error were larger.

关 键 词：涡轮增压器 涡轮端 传热分析 边界条件 热吹试验 

分 类 号：TK421.8[动力工程及工程热物理—动力机械及工程]