张金明1，2，张健健1，2 ，马超2，3，苗熠芝1，2，张国栋1，2
1.康跃科技股份有限公司，山东寿光262718；2.机械工业内燃机增压系统重点实验室，山东寿光262718；3. 潍坊学院机电与车辆工程学院山东潍坊261061
摘要：为研究涡轮壳废气旁通阀总成卡滞原因和壳体应力分布，通过数值模拟方法建立某型号涡轮增压器的涡轮机有限元分析模型，采用CFX软件对涡轮增压器涡轮壳进行流固耦合分析，仿真分析涡轮壳体温度场分布和应力分布，进行增压器温度场发动机台架试验。结果表明：发动机排温高是涡轮壳废气旁通阀卡滞的原因，设计时应关注涡轮壳高应力区域；仿真与试验结果高度吻合，可为工程应用中分析涡轮壳破坏、阀门总成卡滞等失效模式及增压器总成设计提供技术参考。
关键词：涡轮增压器；涡轮壳总成；计算流体动力学分析；流固耦合；温度场；热应力
Abstract:In order to study the cause of the wastegate sticking and the stress distribution of the shell,the finite element model of a certain type of turbocharger is established by numerical simulation method. The CFX software is used to analyze the temperature field and stress of the turbocharger turbine housing by fluidsolid coupling, and the temperature field test of turbocharger based on engine bench is carried out .The results show that the high exhaust temperature is the cause of the wastegate sticking, and the stress analysis shows that the high stress region should be paid attention to when it is been designed,the simulation results are in good agreement with the test results, the simulation results can provide a reference basis for analyzing the failure modes of turbine housing, wastegate assembly and turbocharger assembly design.
Keywords:turbocharger;turbine housing assembly;computational fluid dynamics analysis; fluidsolid coupling;temperature field;thermal stress
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