动力舱排气引射器设计及其内部流场数值模拟  

Design and Numerical Simulation on the Exhaust Ejector System of Vehicle Power Cabin

作　　者：张保成[1] 张子英[1] 张生保[2] 

机构地区：[1]中北大学机械工程与自动化学院 [2]中国人民解放军63710部队

出　　处：《中北大学学报（自然科学版）》2009年第6期518-523,共6页Journal of North University of China(Natural Science Edition)

基　　金：山西省高等学校优秀青年学术带头人支持计划资助

摘　　要：采用了利用发动机废气能量的通风散热除尘技术,考虑到动力舱空间限制的制约,为某型重载车辆优选设计了一种排气抽尘引射器.并利用流体动力学数值仿真技术,开展了数值模拟计算,探讨了引射器结构对引射系数的影响,得到了关键结构参数对引射系数的影响规律.据此,改进设计出5种排气引射器型式,使其引射性能得以改善;考虑到紧凑性、轻量化的设计要求,在满足通风散热要求的前提下,不盲目追求最大的引射系数.给出针对混合室工作段长度参量不同的设计方案的对比结果:混合室工作段长度在125 mm附近时,引射器可达到最优引射效果.With the ventilation,heat-dispersion and dust-removal technology based on engine exhaust gas energy,considering the power cabin space limitation,a kind of exhaust ejector is optimally designed for a certain type of heavy vehicle.Using the numerical simulation technology of the fluid dynamics,numerical analog computation is carried on,and the disciplinarian that key structure parameter influence to injection coefficient is obtained.Many better types are designed based on the above prototype,and the injection capability is improved.According to the compaction and lightweight design request,the ejection coefficient is not maximal but adequate.The comparison results indicate that ejector may achieve the most superior injection effect when chamber working segment is about 125 mm long.

关 键 词：排气引射系统 动力舱 数值仿真 引射系数 

分 类 号：U464.138[机械工程—车辆工程]