摘要
建立了进气道喷射式汽油机模型,采用数值计算的方法研究了进气回流对燃油挥发量的影响.结果表明,采用闭阀喷射模式时,气缸内部高温燃气的回流使得附壁油膜表面能够得到更多的热量,有利于提高附壁油膜挥发量;采用开阀喷射模式时,气缸内部的高温燃气的回流与喷雾相互作用,促进了燃油的空间挥发,燃油空间挥发油量增大.
Based on the validation of the simulation model for intake-port fuel injection engine （PFI）, the effect of back-flow on fuel evaporation mass is studied by numerical simulation method. The results show that for closed valve injection （CVI）, the back-flow of hot gas from the cylinder is helpful to wall-film evaporation because wall-film can get more energy for evaporation. For open valve injection （OVI）, the back-flow of hot gas can interact with fuel spray, which is advantageous for fuel space evaporation, and with fuel space evaporation and wall-film evaporation considered together, back-flow can increase fuel evaporation mass.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2012年第1期67-72,共6页
Journal of Combustion Science and Technology
基金
教育部留学回国人员科研启动基金资助项目
天津大学内燃机燃烧学国家重点实验室开放基金资助项目(SKLE200908)
关键词
汽油机
进气回流
数值计算
燃油挥发量
gasoline engine
intake back-flow
numerical simulation
fuel evaporation mass
