液力缓速器三维瞬态流场大涡模拟及特性计算  

Large Eddy Simulation of the 3D Transient Flow Field in a Hydraulic Retarder and Characteristics Prediction

作　　者：李雪松[1] 程秀生[1] 苗丽颖[1] 刘春宝[2] 

机构地区：[1]吉林大学汽车工程学院,吉林长春130022 [2]吉林大学机械科学与工程学院,吉林长春130022

出　　处：《液压气动与密封》2010年第3期38-41,共4页Hydraulics Pneumatics & Seals

基　　金：吉林省科技发展计划项目(项目编号:20050317-1)

摘　　要：为深入了解液力缓速器内部复杂的三维流动,采用大涡模拟和多可动区域计算的滑动网格法,利用FLUENT软件对液力缓速器全充液工况内部三维瞬态流场进行数值模拟。对计算得到的三维流场分布特性进行深入研究,分析流动现象成因,为提高液力缓速器性能奠定理论基础。基于流场数值解对制动扭矩进行了计算,将计算结果与实验结果进行对比分析,二者误差在5%以内,说明采用的数值模拟方法是准确有效的。To deeply understand the complicated three - dimension flow in the hydraulic retarder, based on the method of large eddy simulation and sliding mesh method for multi - flow regions, the three - dimension transient numerical simulation of single - phase turbulence flow in the hydraulic retarder was performed. The numerical results obtained were further studied, and the causes of the flowing phenomena were analyzed, all of which may well lay a theoretical foundation for improving the performance of the hydraulic retarder. The braking torque was also calculated, and it is found out that the simulation results agree approximately with the experimental results and the maximum is 5% , which proves the effectiveness of the numerical simulation method.

关 键 词：液力缓速器 大涡模拟 瞬态流场 特性计算 

分 类 号：U463.5[机械工程—车辆工程]