耦合动力学的微发动机燃烧过程研究  

Coupled Dynamic Modeling of the Micro HCCI Combustion Characteristics in the Free-Piston Engine

作　　者：王谦[1] 陈博[1] 刘庆[1] 陈俊杰[1] 陈泽[1] 

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《内燃机学报》2009年第3期242-248,共7页Transactions of Csice

基　　金：国家自然科学基金资助项目(50576032)

摘　　要：基于丙烷燃烧化学动力学机理并考虑传热、漏气过程对微型自由活塞发动机均质充量压缩燃烧(HC-CI)过程进行数值模拟研究,结合Star-CD/Kinetics软件实现了自由活塞运动与燃烧过程耦合的计算方法,在此基础上,详细研究了不同参数下微型发动机燃烧过程压力、温度的变化规律,探讨了微发动机循环过程中传热损失和混合气泄漏对微尺度燃烧过程的影响,研究结果表明:当量比、压缩比和自由活塞频率显著影响微发动机燃烧过程,传热损失对微HCCI自由活塞发动机燃烧过程的影响不大,而混合气泄漏损失的影响比较明显。Based on the propane combustion kinetics and considering the influence of heat loss and mixture leakage, the numerical simulation on combustion characteristics in a micro free-piston HCCI （Homogeneous Charge Compression Ignition） engine was made. Model of micro combustion with heat loss and gas leakage was developed. The numerical method for combustion process coupling with the free piston movement was studied. The pressure and temperature characteristics and the effects of heat loss and gas leakage on combustion in micro free piston engine were researched. The calculated results showed that heat loss gave little effects on HCCI combustion while the gas leakage greatly influenced the combustion and micro engine performance.

关 键 词：微发动机 均质压燃 数值模拟 自由活塞 

分 类 号：TK441[动力工程及工程热物理—动力机械及工程]