基于流场特性的液力缓速器叶栅角度优化设计  

Cascade Angle Optimization of Hydraulic Retarder Based on Flow Field Characteristics

作　　者：李雪松[1] 刘春宝[2] 程秀生[1] 苗丽颖[1] 

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,长春130025 [2]吉林大学机械科学与工程学院,长春130022

出　　处：《农业机械学报》2014年第6期20-24,37,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金青年科学基金资助项目(51305156);中国博士后科学基金资助项目(2011M500602);江苏省汽车工程重点实验室开放基金资助项目(QC201201)

摘　　要：为了提高液力缓速器制动转矩系数,对液力缓速器内湍流流动进行了三维瞬态多相流数值模拟。通过对其内流场特性分析,发现液力缓速器工作流道的壁面脱离现象以及弦面内产生的涡旋区不利于恒定制动转矩的输出。针对这一问题,考虑到液力缓速器各结构参数之间的相关性,对多参数共同作用的内流场进行数值分析,优化叶栅参数。结果表明,通过分析多参数共同作用的流场来优化缓速器叶栅参数的方法比较合理;对液力缓速器叶片前倾角和叶片前缘倒角进行优化后,叶轮流道内存在的涡团和流动分离现象基本消失,制动转矩系数提高6%。In order to improve the braking torque coefficient, the numerical simulation of 3D transient multiphase flow was performed to the turbulent flow in Hydraulic Retarder. By the analysis of internal flow field characteristics, both the flow separation phenomenon in the work flow channel and the vortex generated in the chord surface went against the output of the braking torque. To solve this problem, considering correlation between the structural parameters of hydraulic retarder, numerical analysis based on multi-parameter flow field was performed, and the blade cascade parameters were optimized. The results showed that, the method through the analysis of the multi-parameter flow field to optimize blade cascade parameters was reasonable. When the blade angle and chamfer angle were optimized, the vortex and the flow separation phenomenon in the flow channel of impeller disappeared and the braking torque coefficient increased by 6%.

关 键 词：液力缓速器 流场特性 相关性 叶栅优化 

分 类 号：TH137.331[机械工程—机械制造及自动化]