基于STAR-CCM+的发动机曲轴箱通风系统CFD分析  

The CFD Analysis of Engine Crankcase Ventilation System based on STAR-CCM

作　　者：李军[1] 向璐[1] 王翀 

机构地区：[1]重庆交通大学机电与汽车工程学院,重庆400074 [2]重庆长安汽车股份有限公司动力研究院,重庆401120

出　　处：《机械设计与制造》2016年第4期88-90,共3页Machinery Design & Manufacture

基　　金：国家自然科学基金资助项目(51305472);重庆市自然科学基金重点项目(CSTC2013yykf B0184);重庆交通大学研究生教育创新基金项目(20120108)

摘　　要：为详细了解发动机曲轴箱通风系统内部的气体流动规律,采用STAR-CCM+模拟具有通风功能和无通风功能的两种曲轴箱通风系统它们各自内部的气体流动过程。计算结果表明,稳态情况下,曲轴箱通风系统内部除油气分离器外其它部分气体流速均较低;活塞漏气主要通过曲轴箱、前罩盖进入凸轮轴室,只有小部分气体通过回油道进入凸轮轴室;新鲜空气从通风管进入凸轮轴室后,大部分在凸轮轴室内流动,小部分通过回油道进入曲轴箱内,并与活塞漏气一起流向油气分离器;引入新鲜空气进入曲轴箱通风系统后,提高了曲轴箱通风系统整体的气体流动速度。To learn more about the gas flow pattern inside the engine crankcase ventilation system,it used the STAR-CCM ＋simulation two crankcase ventilation system with a ventilation function and no ventilation function of their respective internal gas flow process. The results show that,under steady-state conditions,the gas flow rate except in the gas separator the crankcase ventilation system was lower;the piston leakage mainly came from the crankcase and front cover,only a small portion of the gas through the oil path into the cam chamber;fresh air from the ventilation tube into the camshaft room,most of them flowed in the camshaft interior,a small portion of the oil into the crankcase through the return path,together with the amount of piston leakage flowed into the oil separator; after the introduction of fresh air into the crankcase ventilation system,the overall gas flow rate of the crankcase ventilation system had been improved.

关 键 词：发动机 曲轴箱 通风系统 STAR-CCM+ 

分 类 号：TH16[机械工程—机械制造及自动化] TK413.3[动力工程及工程热物理—动力机械及工程]