摘要
为揭示二冲程汽油机扫气过程的特点，对倒拖工况下二冲程汽油机的气缸、扫气道和排气道内的流场进行了多维数值模拟．计算结果与实验结果表明，曲轴箱与排气道之间的压差对扫气道的流速有决定性的影响．计算发现，在扫气过程中出现双环涡和滚涡。
Calculations are made to analyze the flow field for the engine cylinder, transfer pipes and eshaust pipe of a loop scavenged engine. Result shows the pressure difference between the crank case and the exhaust pipe has a definite influence on the flow field of the transfer pipe. A pair of toroidal vortex and tumble vortex are found in the cylinder during the scavenging process. And the tumble vortex is maintained up to the nearly top dead center.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
1999年第1期69-72,101,共5页
Journal of Xi'an Jiaotong University
基金
国家攀登计划资助
关键词
流场模拟
二冲程内燃机
扫气
汽油机
数值模拟
flow filed simulation
two stroke internal combustion engine
scavening
