Cascade design and optimization for hydraulic torque-retarder assembly

In order to improve the power density of transmission system, a hydraulic torque-retarder assembly, which is a combination of torque converter and hydraulic retarder, is proposed. The parameterized torus and blade design approach is carried out, and CFD analysis processes are automated by programs and secondary development technique. Geometry modeling, mesh generating and CFD analysis are integrated and a 3D flow design platform is built, thus the combination of CFD and optimization is realized. The 3D flow design platform is employed to design a hydraulic torque-retarder assembly and the results show that the new approach is able to optimize the cascade of hydraulic torque-retarder. A high brake torque is achieved without sacrificing too much power and efficiency.