自由活塞柴油直线发电机均质充量压燃工况分析  

Operating Mode of HCCI Combustion of Free-Piston Diesel Engine for Linear Generator

作　　者：陈光辉[1] 刘春辉 陈宏威[2] Chen Guanghui;Liu Chunhui;Chen Hongwei(Internal Combustion Engine Research Institute,Tianjin University,Tianjin 300072,China;School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]天津大学内燃机研究所,天津300072 [2]北京理工大学机械与车辆学院,北京100081

出　　处：《天津大学学报（自然科学与工程技术版）》2018年第11期1124-1129,共6页Journal of Tianjin University：Science and Technology

基　　金：国家重点研发计划项目(2016YFD0700800)~~

摘　　要：在分析活塞运动规律基础上,针对自由活塞柴油直线发电机HCCI燃烧过程,建立了耦合柴油详细化学反应机理的CFD模型,搭建了对置二冲程自由活塞柴油直线发电机实验样机系统,并通过实验测试结果验证了该CFD模型的有效性.仿真分析了初始温度、初始压力、当量比和压缩比等工况变化对HCCI燃烧的影响.仿真结果表明:自由活塞柴油直线发电机HCCI燃烧具有典型的两阶段特征,先进行低温反应放热阶段,后进行高温反应放热阶段;随初始温度、初始压力、当量比和压缩比的增大,燃烧相位提前,燃烧放热率峰值、缸内最高温度和最大压力随之增大.Based on the piston motion law analysis,the CFD model coupled diesel mechanism of combustion for free-piston engine linear generator(FPELG)HCCI combustion processes was established and then verified experimentally with horizontally opposed two-stroke FPELG experimental prototype.The influence of some key parameters such as initial temperature,initial pressure,equivalence ratio and compression ratio on HCCI is discussed.The simulation results showed that heat release rate is typically of two-stage auto-ignition,with low temperature reaction(LTR)first and then high temperature reaction(HTR).With the increases of initial temperature,initial pressure,equivalence ratio and compression ratio,the maximum of heat release,cylinder temperature and cylinder pressure increase.

关 键 词：自由活塞柴油直线发电机 均质充量压燃 化学反应动力学 数值模拟 

分 类 号：TK441[动力工程及工程热物理—动力机械及工程]