CAJ | 학술논문

文章利用分析软件ANSYS对某型号发动机排气管在高温废气作用下的温度场和热应力进行模拟分析。首先利用ANSYS对该发动机排气管做内外流场CFD分析，得到排气管内外表面的对流换热系数和流场的温度分布，然后把CFD分析得到的结果作为边界条件对排气管做流固耦合分析得到了排气管的热应力分布。文章的分析结果对于分析裂纹产生原因和降低裂纹发生频率有着很重要的参考价值，并为该排气管的下一步优化改进提供了重要的理论依据。
문장이용분석연건ANSYS대모형호발동궤배기관재고온폐기작용하적온도장화열응력진행모의분석。수선이용ANSYS대해발동궤배기관주내외류장CFD분석，득도배기관내외표면적대류환열계수화류장적온도분포，연후파CFD분석득도적결과작위변계조건대배기관주류고우합분석득도료배기관적열응력분포。문장적분석결과대우분석렬문산생원인화강저렬문발생빈솔유착흔중요적삼고개치，병위해배기관적하일보우화개진제공료중요적이론의거。
In this paper, the temperature field and the thermal stress the exhaust pipe of some type of impacted by high temperature exhaust gas was analyzed simulatedly with the analysis software ANSYS. Firstly, CFD analysis was made on internal and external flow field of the exhaust pipe with ANSYS and the heat exchange coefficient and temper-ature distribution on the internal and external surface of the exhaust pipe was figured out. Take the results of the CFD as the boundary condition, the distribution of thermal stress on the exhaust pipe was drawed based on fluid-structure interac-tion analysis for the exhaust pipe. The result can be reference for finding the causes resulting in the fracture and low-ering the occurrence of fracture , and provide strong theoretical basis for the optimization design of the exhaust pipe.