液力变矩器的流场数值模拟及试验对比  

Numeric Simulation and Experimental Comparison of Flow Field in Hydraulic Torque Converter

作　　者：郭刘洋[1] 杜明刚[1] 李吉元[1] 

机构地区：[1]中国北方车辆研究所车辆传动国家重点实验室

出　　处：《工程机械》2009年第2期42-46,共5页Construction Machinery and Equipment

摘　　要：液力变矩器作为一种有效的增矩变速元件广泛应用于车辆传动中。通过对某液力变矩器整周模型简化、网格划分,利用CFD(Computational Fluid Dynamics)技术对其进行流体计算,获取了液力变矩器内流场的速度及压力信息,得出全充液状态下的转速比i、变矩比K、泵轮转矩系数λ以及效率η,从而得到液力变矩器的原始特性曲线。对样机的台架试验结果与一维束流理论计算结果进行了对比分析,对仿真结果进行了验证,结果表明,三者在数值上吻合较好,说明三维流场数值计算方法应用于液力变矩器的性能预测是可行的,可以应用于工程实际。Hydraulic torque converters are used extensively in vehicle drive as an efficient torque amplifying /speed adjusting component. Through model simplification for circumference model and grid partition of a certain hydraulic torque converter and applying CFD technique to perform fluid calculation, the velocity and pressure information of internal flow field are obtained. The speed ratio i, torque ratio k, impellor torque coefficient and efficiency are derived hence the original characteristic curve of the torque converter is obtained. Comparative analysis is carried out for bench test result of prototype vs. result of one-dimensional sheaf theory calculation to verify the simulation result. The results demonstrate that the three are in nice coincidence which means that it is feasible to apply three dimensional numerical calculation approach to performance prediction of hydraulic torque converter in engineering practice.

关 键 词：液力变矩器 CFD 原始特性曲线 

分 类 号：TH137.332[机械工程—机械制造及自动化] TP391.41[自动化与计算机技术—计算机应用技术]