Numerical investigation of hydrodynamic tractor-retarder assembly under traction work condition  

作　　者：闫清东 邹波 魏巍 

机构地区：[1]School of Mechanical Engineering,Beijing Institute of Technology [2]National KeyLaboratory of Vehicular Transmission,Beijing Institute of Technology

出　　处：《Journal of Beijing Institute of Technology》2011年第4期472-477,共6页北京理工大学学报（英文版）

基　　金：Supported by the National Key Laboratory of Vehicular Transmission (9140C3405020905);the National Natural Science Foundation of China(50905016)

摘　　要：To obtain the performance characteristics of hydrodynamic tractor-retarder assembly under traction work condition,a numerical simulation model of flow channel was established and tetrahedron unstructured grids were adopted in the meshing stage.The racing rotating speed of the brake wheels was calculated by computational fluid dynamics（CFD） calculation and interpolation,and then accurate boundary condition was applied to the CFD simulation to study the pressure and velocity distribution of internal flow field in hydrodynamic tractor-retarder assembly.Finally,the original characteristics were calculated by CFD post-processing analysis.Comparison of experimental data and flow field analysis results showed that the calculation tolerance of the torque ratio K and the efficiency η was less than 5%,and the calculation tolerance of the pump torque coefficient λ was less than 10%.To obtain the performance characteristics of hydrodynamic tractor-retarder assembly under traction work condition,a numerical simulation model of flow channel was established and tetrahedron unstructured grids were adopted in the meshing stage.The racing rotating speed of the brake wheels was calculated by computational fluid dynamics（CFD） calculation and interpolation,and then accurate boundary condition was applied to the CFD simulation to study the pressure and velocity distribution of internal flow field in hydrodynamic tractor-retarder assembly.Finally,the original characteristics were calculated by CFD post-processing analysis.Comparison of experimental data and flow field analysis results showed that the calculation tolerance of the torque ratio K and the efficiency η was less than 5%,and the calculation tolerance of the pump torque coefficient λ was less than 10%.

关 键 词：fluid transmission and control hydrodynamic tractor-retarder assembly（HTRA） traction condition numerical investigation 

分 类 号：U463.335.1[机械工程—车辆工程]