摘要
喷油器的内部流动以及后续的喷雾特性直接影响了柴油机的排放和经济性能,对喷油嘴的内部流动进行三维瞬态数值模拟分析就显得更为重要。利用计算流体力学软件STAR-CD建立三维动态计算网格并进行模拟分析,得到了喷嘴内部的压力分布和喷孔出口的瞬时速度变化等规律。计算结果可为缸内喷雾研究提供更真实的边界条件,以及对喷嘴结构参数的优化设计具有指导意义。
The investigation of the three-dimension transient flow characteristics inside the nozzle becomes more and more important,because the flow status in the nozzle and fuel injection immediately influence the emission and economy performance of diesel engines. The three dimension dynamic model was performed by computational fluid dynamics software package STAR-CD. The results including pressure distributing and average velocity in the nozzle can provide more realistic boundary conditions for the spray model,which are very useful for the optimum design of the nozzle structure parameters.
出处
《拖拉机与农用运输车》
北大核心
2007年第5期19-21,24,共4页
Tractor & Farm Transporter
关键词
柴油机
数值模拟
喷嘴
CFD
Diesel engine
Numerical simulation
Nozzle
CFD
