Prediction of the Influence of Circulation Circle Design Parameters on the Performance of Torque Converter Based on Computational Fluid Dynamics

Abstract:

In order to improve the efficiency of retrofit design, the parametric flow channel model of a torque converter was established and three-dimensional flow field simulation calculation was also carried out. The reliability of the parametric model was verified by comparing simulation results with the experimental data. On this basis, the influence of torus design parameters, such as relative section area, flatness ratio, the radial ratio of torus and the radius of inlet and outlet, on the performance of the torque converter was studied respectively, and the influence degree of each design parameter on the performance of the torque converter was compared and analyzed. The results show that relative section area has the greatest influence on the stall capacity factor of pump, but has the least influence on stall torque ratio and maximum efficiency; flatness ratio, pump outlet radius and the radius of stator inlet and outlet all have great influence on stall torque ratio, while pump outlet radius has the greatest influence on maximum efficiency. The results provide a theoretical reference for the optimal design of a torque converter.

Key words:torque converter;parametric design;three-dimensional flow simulation;hydraulic performance