柴油微尺度燃烧模型构建及燃烧特性影响规律研究  

Study on the Micro-Scale Combustion Model and Influences of Parameters on Combustion Characteristics

作　　者：韩恺[1,2] 刘超凡 魏石磊 梁永森 HAN Kai;LIU Chaofan;WEI Shilei;LIANG Yongsen(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China;Chongqing Innovation Center,Beijing Institute of Technology,Chongqing 401133,China;China North Engine Research Institute,Tianjin 300400,China)

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]北京理工大学重庆创新中心,重庆401133 [3]中国北方发动机研究所,天津300400

出　　处：《内燃机工程》2022年第5期8-15,共8页Chinese Internal Combustion Engine Engineering

摘　　要：基于CONVERGE三维计算平台构建了耦合柴油化学反应动力学的微尺度燃烧模型,分别研究了初始环境压力、初始环境温度和狭缝间距对燃烧特性的影响。结果表明:初始环境压力越大,初始环境温度越小,狭缝间距越大,瞬时放热率峰值越高且对应时刻越早,最高燃烧温度越高。燃烧前近稳态压力决定是否可以实现微尺度燃烧,燃烧前近稳态压力高于0.69 MPa时方可实现燃烧。Based on the 3D computing platform CONVERGE,a micro-scale combustion model coupling the chemical reaction kinetics of diesel was proposed.And the effects of initial ambient pressures,initial ambient temperatures and slit spacing on the combustion process were studied.Results show that higher ambient pressure,smaller initial ambient temperature,and larger slit spacing leads to greater and earlier peak value of instantaneous heat release rate as well as higher maximum combustion temperature.Besides,the near steady state pressure before combustion determines the occurrence of micro-scale combustion.The micro-scale combustion happens when the near steady state pressure is higher than 0.69 MPa.

关 键 词：微尺度燃烧 正庚烷 化学反应机理 参数影响规律 

分 类 号：TK428.9[动力工程及工程热物理—动力机械及工程]