三种湍流模型对缸盖鼻梁区沸腾换热影响的研究

为了比较湍流模型对缸盖鼻梁区换热计算结果的影响,采用三种湍流模型对简单的T型截面刚体进行数值模拟计算,并与实验数据进行了对比。结果表明,在相同边界条件下,不同湍流模型的计算结果有很明显的差别。在沸腾状态下,对于换热问题的计算,采用AKN模型和SST模型都比较合适。其中AKN模型的计算值与实验值的偏差最小。

Study on The Heat Transfer Effect of Cylinder Head''s Boiling Bridge Zone with Three Turbulence Models

In order to compare the influence to th e nose bridge area in heat transfer calculation with different turbulence models, the author used three kinds of turbulence models on simple T-section rigid in numerical simulation, and made comparison of test data. The result shows that there are obvious differences between the calculation results of different turbulence models under the same boundary conditions. In the boiling state, the AKN model and SST model are more suitable for the calculation of heat transfer problem. The calculation value of the AKN model (low Reynolds number k-model) is most closed to the test value.