A 3D torque converter design system is developed based on numerical investigation into flow field and CAD technology. The 3D steedy-state flow field simulation is undertaken by using time averaged Reynolds equation and k-epsilon turbulence model, with mixing-plane boundary conditions at three section interfaces. The blades are designed according to the flow field characteristics by using a reverse design method in the system. The accurateness of numerical analysis and the validity of design system are verified by the fluid field experiment of desingn example of the torque converter. This kind of design and analysis system for torque converter based on integration of comput ationol fluid dynamics(CFD) and CAD is a powerful tool for torque converter manufacturing, but also a prettg important significance for research and development.
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