关键词: 液力变矩器, 叶栅设计, 环量分配法, 束流理论, 计算流体力学

Abstract: In this paper，a new momentum distribution method with circumferential uniform acceleration is proposed to improve the traditional momentum distribution method used in the blade design of hydraulic torque converter (HTC)． In this method，the fluid particle movement inside the HTC is decomposed into the axis plane movement and the circumferential movement，and the equation of circumferential force of blades is derived based on the equations of the angular momentum and the velocity momentum． Then，the relationship between the velocity momentum and the circumferential movement is obtained，and the new momentum distribution scheme with circumferential uniform acceleration is obtained with a stable circumferential acceleration process of flow bundle． The new scheme is compared with the traditional momentum distribution scheme，and the computational fluid dynamics(CFD) is utilized to predict the performance of the HTC designed according to the new and traditional schemes．Thus，the effectiveness of the new momentum distribution method is verified．

Key words: hydraulic torque converters, blade design, momentum distribution method, flow bundle theory, computational fluid dynamics