摘要
用AVL-FIRE软件建立了TBD234V6高压共轨大功率柴油机喷油器喷嘴内部流动的仿真计算模型;研究了共轨大功率柴油机喷油器主要结构参数,包括喷孔直径、喷孔个数、喷孔长径比、喷射夹角等,对燃油在喷嘴内部流动的影响。分析表明:喷嘴结构参数不同会使各喷孔内气穴产生的时刻、分布区域以及强度不一致,最终影响各喷孔的流量特性,并且传递到喷孔出口面,对喷雾特性产生影响。
The simulative calculation model of the oil flow in the nozzle hole of diesel engine with high- pressure common rail injector was built up by AVL-FIRE. The influence of main geometric parameters of high-pressure common rail injector (including diameter, number, length/diameter, spray angle etc. ) on flow rate of fuel oil in the injector hole is studied. The analysis shows that the differences of injector' s ge- ometric parameters may result in inconsistent of air sink occurring time in injector holes, distributing are- as and strength, and ultimately influence the flow characteristics of the injector holes, which could be transferred to the outlet of injector holes and affect the spray characteristics.
出处
《柴油机》
2011年第6期25-28,共4页
Diesel Engine
关键词
大功率柴油机
高压共轨
喷油嘴
结构参数
large power diesel engine
high pressure common rail system
fuel injector
geometric parameters