Numerical Simulation and Experiment Study on Internal Flow Field in Impeller of Torque Converter

The internal flow field in impeller of a torque converter will have great effect on the working characteristics of the torque converter. The numerical model of internal flow field in impeller of the torque converter was established by using the hexahedron grids based on the turbulent model k~ε and SIMPLE algorithm. To solve the interaction between the various stages with different speeds, the mixing plane theory was used in the calculation. In order to get the distribution of velocity and pressure of the flow passage, the torque converter 280 was modeled in detail and the internal field was analyzed by using the Fluent software. The distribution rules of velocity and pressure at inlet, outlet of the impeller, the flow field pattern were analyzed. The external performance of the impeller was calculated. To verify the accuracy of the numerical simulation, the results were validated experimentally. The computed results showed good agreement with the experimental results, and the characteristics of the torque converter were predicted.