关键词: 涡轮箱, 耦合传热, 温度场, 热应力

Abstract:

Based on the heat transfer mechanism of the turbocharger turbine box, a fluid mesh model and a solid one for simulation were  built by using the professional software CFD and FEM respectively. The multiple coordinate system of rotation in the fluid domain was established to calculate accurately the flow field of turbine boxes, heat transfer coefficient and temperature. Coupled heat transfer analysis of the turbocharger turbine box was carried out by the fluid-solid coupling method, and then the temperature field for solid areas was obtained. Based on the temperature,its thermal stress analysis was carried out. In comparison with the experiments, the temperature distribution of the simulation model accords with that of the realistic turbocharger turbine box, the maximum deviation is only 3.3%. The coupled heat transfer model for the turbocharger turbine box has a high accuracy, which provides the basis for better design of turbocharger turbine.

Key words: turbine box, coupled heat transfer, temperature field, thermal stress