微自由活塞动力装置均质压缩燃烧过程的试验研究  

Experimental Study on Homogeneous Charge Compression Ignition Combustion Process of Micro Free-Piston Power Device

作　　者：柏金[1] 王谦[1] 何志霞[1] 张彭岗[1] 

机构地区：[1]江苏大学能源与动力工程学院,镇江212013

出　　处：《内燃机工程》2015年第5期25-29,35,共6页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金项目(51076060);江苏省研究生科研创新计划项目(CXZZ12_0672)

摘　　要：为了研究微自由活塞动力装置燃烧过程及特征,搭建了燃烧过程可视化试验平台,结合高速摄像技术获得单次冲击压缩燃烧试验过程影像,分析了活塞运动特性及混合气燃烧特性。研究结果表明:混合气在微尺度空间里可以压缩着火燃烧。通过变参数试验对比,分别得出活塞初始速度、微燃烧室几何形状及活塞质量等因素对燃烧过程的影响规律。对于二甲醚与空气的混合气,研究表明存在临界压缩比,当压缩比大于18时混合气才能完全压缩燃烧。In order to make further study on compression ignition combustior~ process and its characteristics of a micro-free piston power device, an experimental setup of visualized combustion process was built. Images of single shot compression combustion process were thereby obtained with high speed digital camera, with which the characteristics of combustion and piston motion were analyzed. The experimental results show that gas mixture could be compressed into combustion in a micro space. Influences of initial piston velocity, micro combustion chamber geometry and piston mass on compression combustion process were obtained by parametric experimental study. The study indicates that there exists a critical compression ratio for the gas mixture of methyl ether and air, which means that the gas mixture could completely be compressed into combustion when compression ratio is greater than 18. The experimental results provide theoretic reference for revealing the law of micro compression combustion and designing a micro power system.

关 键 词：内燃机 微动力装置 可视化试验 自由活塞 均质压缩燃烧 

分 类 号：TK421.2[动力工程及工程热物理—动力机械及工程]