陈永哲，雷舒蓉，费洪庆，闫伟

山东大学能源与动力工程学院

摘要：本文以某型排气歧管总成为研究对象，建立了排气歧管总成固体与内部烟气以及外部空气的对流换热模型，运用Fluent软件对排气歧管内外流场进行数值模拟，在Abaqus软件中进行排气歧管固体的温度场和应力场的计算，并且运用Femfat软件对排气歧管进行疲劳计算。

关键词：排气歧管；热应力；疲劳

Abstract: basing on a certain type of exhaust manifold assembly, the paper establishes the model of heat exchanging among the gas exhaust pipes, internal exhaust air and external cold air. The flow field inside and outside the exhaust manifold was simulated by using the Fluent software. The thermal field and stress field were simulated by the Abaqus software, and the fatigue was calculated by the Femfat software. 

Key Words: Exhaust Manifold; Thermal Stress; Fatigue