摘要
在试验的基础上运用瞬态数值模拟方法,以四气门汽油机进气过程为例,对均值压力边界和瞬态波动压力边界下的进气过程进行了模拟计算及比较,结果表明进气压力波动对缸内的宏观气流运动影响较大,加强了缸内滚流运动强度的波动.而对缸内宏观热物性参量的影响较小,这些参量在压力波动的过程中没有出现大幅波动.
Three dimensional transient simulation is an effective way to explore the transient intake flow characteristics under dynamic pressure boundary condition. The intake processes under two kinds of intake pressure boundary are simulated in the article, including the cycle averaged pressure boundary condition and the dynamic pressure boundary condition. Comparison between the two results shows that dynamic pressure boundary condition may have greate influence on the tumble motion of the intake flow, whereas have less influence on the macro thermo parameters of in-cylinder fluid field.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第5期91-94,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
关键词
汽油机
波动压力边界
流场特性
瞬态数值模拟
gasoline engine
dynamic pressure boundary condition
flow field characteristic
transient simulation
