压燃式自由活塞直线发电机参数匹配设计与工作过程仿真  

Parameter Match Design and Working Process Simulation of Compression Ignition Free Piston Linear Generator

作　　者：徐岩[1] 冯慧华[2] 毛金龙[2] 左正兴[2] 

机构地区：[1]中国兵器科学研究院,北京100089 [2]北京理工大学机械与车辆学院,北京100081

出　　处：《车用发动机》2011年第5期12-17,共6页Vehicle Engine

基　　金：国家自然科学基金资助项目(51006010)

摘　　要：根据自由活塞发动机和直线电机之间存在的能量守恒关系,利用所选择的商用直线电机进行压燃式自由活塞发动机的参数匹配设计。通过分析得到直线电机与自由活塞发动机主要结构参数之间的关系,再对系统的工作过程、自由活塞发动机的换气和燃烧过程进行CFD仿真,反复进行迭代计算,确定压燃式自由活塞发动机的具体几何结构参数。从参数匹配关系式可以看出,自由活塞发动机缸径的平方近似与直线电机的峰值载荷成正比。Based on the energy conservation between free piston engine and linear generator, the parameter match design of compression ignition free piston engine was carried out with a commercial linear generator. The relation of main structural parameters between linear generator and free piston engine was acquired by analysis, then the CFD simulations of working process for the whole system and gas scavenging and combustion processes for the free piston engine were carried out. Through the iterative calculation, the concrete geometric parameters of compression ignition free pission engine were finally determined. It was also found that the peak load of linear generator was approximately proportional to the square of free piston engine cylinder diameter from the match relation.

关 键 词：压燃式 自由活塞 直线发电机 匹配 仿真 燃烧 计算流体动力学 

分 类 号：TK441[动力工程及工程热物理—动力机械及工程]