摘要
利用准维紊流卷吸燃烧模型计算研究了点火时刻气缸内紊流参数的变化对汽油机燃烧循环变动的影响。结果表明，点火时刻紊流强度u′及紊流长度积分标尺L的变动对汽油机燃烧循环变动均有很大影响，增大u′或L均有利于加快燃烧速度及火焰传播速度，缩短火焰发展期；u′或L的变动加大，燃烧循环变动也随之加大，其中，u′对燃烧循环变动的影响尤其大。
This paper has studied the effect of variation of in-cylinder turbulence Characteristies at spark ignited time on the cyclic combustion variation for spark ignition engine using turbulent entrainment combustion model. It verifies that the valiations of both turbulence intensity u' and the turbulence integral length scale L have Iarge effect on the cyclic combustion variation for spark ignition engine, and increasing u' and L is helpful to speed up combustion rate and flame propagation velocity,and decreases the flame development period. With the increase of u' and L variations,the cyclic combustion variation is also increased,rand especially the effect of u' on the Cyclic combustion variation is more significant.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
1994年第4期12-18,共7页
Chinese Internal Combustion Engine Engineering
关键词
汽油机
计算
湍流
Combustion Model Turbulence Cycle Gasoline Engine
