摘要
把涡流室式柴油机不同区域与不同时期的燃烧过程分开处理，将涡流室的燃烧过程划分为３个阶段，即：低温着火化学动力学反应阶段、高温预混燃烧化学动力学反应阶段和相关火焰微元的扩散燃烧阶段，而认为主燃烧室的燃烧只有相关火焰微元的扩散燃烧阶段。用Ｓｈｅｌ着火模型、Ａｒｒｈｅｎｉｕｓ方程和相关火焰微元模型来分别模拟低温着火、高温预混燃烧和扩散燃烧过程。开发了三维数值模拟计算程序并对其进行计算，研究了涡流室中瞬态温度场的变化过程。模型预测的示功图和涡流室中的燃烧放热率与试验值吻合良好。
The combustion events of a swirl chamber diesel engine in distinct place and distinct stage are processed differently.The combustion in the swirl chamber is broken into three phases:low temperature ignition kinetics,high temperature premixed kinetics burn and flamelet diffusion burn phase.While the burn in the main chamber is considered as flamelet diffusion combustion.The Shell ignition model,global Arrhenius equation and coherent flamelet model are used to model low temperature ignition,high temperature premixed burn and diffusion burn respectively.Three dimensional numerical calculation program is developed and the calculation of the combustion process has been carried out.The change of transient temperature fields in the swirl chamber is studied.The pressure and the heat release rate in the swirl chamber predicted by the model match well with the results derived from experiment.
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
1999年第2期112-117,共6页
Transactions of Csice
基金
国家自然科学基金
关键词
涡流室式
柴油机
相关火焰微元
数值模拟
燃烧
Swirl chamber diesel engine
Coherent flamelet
Flame area density
Numerical simulation
