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液力变矩器内部的液体流动是一个非常复杂的三维流动问题。在液力变矩器设计和制造过程中,利用CFD(Computational Fluid Dynamics计算流体力学)从事设计和分析时,CFD数值模拟的精确程度与模型的建立和采取的数值方法、网格的划分以及边界条件的选择有关。为了考察这些影响因素,对典型的YB355-2型液力变矩器的三维流场进行了建模,用非结构化网格对变矩器计算域进行了网格划分,并利用混合平面模型中的压力-质量流量混合平面对和标准的两方程(k-ε)模型进行了数值模拟。其结果与相同的边界条件和工作条件下的试验结果达到了较满意的吻合。
Liquid flow inside the torque converter is a very complex three-dimensional flow problem. In the design and manufacture of torque converters, CFD (Computational Fluid Dynamics CFD) engaged in the design and analysis, the accuracy of CFD numerical simulation model and the establishment and adoption of numerical methods, the division of the grid and the border Conditions related to the choice. In order to investigate these influencing factors, the three-dimensional flow field of a typical YB355-2 torque converter was modeled, and the meshes of the torque converter were meshed using unstructured grids. The hybrid planar model In the pressure-mass flow mixing plane and the standard two-equation (k-ε) model were numerically simulated. The result is in good agreement with the experimental results under the same boundary conditions and working conditions.