液力变矩器流固耦合研究

Study on Fluid-solid Interaction of Torque Converter

液力变矩器工作过程中流体与结构的耦合作用不仅影响其性能,还会产生液流激振力,导致结构的振动疲劳甚至破坏。基于MFX-ANSYS/CFX耦合平台,研究了流固耦合问题的求解方法及其关键技术。采用有限体积离散方法、SIMPLE速度-压力耦合算法、切应力输运(SST)湍流模型以及非结构化网格,对液力变矩器的流固耦合作用进行了数值模拟,分析了其耦合特性,对液力变矩器涡轮叶片结构的优化设计进行了验证。

The fluid-solid Interaction（FSI）between structure and fluid not only has effect on performance of torque converter,but also induces excitation force leading to vibration fatigue or even crashing of structure.The work flow and key technology of solving fluid-solid interaction problem are studied based on MFX-ANSYS/CFX.The fluid-solid interaction of torque converter （TC）is simulated by adopting finite volume method,SIMPLE algorithm,shear stress transport （SST） turbulence model and unstructured grid,and the characteristic of fluid-solid interaction about torque converter is analyzed,finally the optimization design of turbine blade is validated.