| 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。 |
| 关键词: 大功率柴油机 高压共轨 喷油嘴 结构参数 |
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| Simulative Study on the Flow in the Nozzle Hole of High-pressure Common Rail Injector of Large-power Diesel Engine |
| Chen Xiaomin,Chang Hanbao,Qin Jianwen |
| College of Marine and Power,Naval University of Engineering,HubeiWuhan 430033 |
| Abstract: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 geometric parameters may result in inconsistent of air sink occurring time in injector holes, distributing areas 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. |
| Key words: large power diesel engine high pressure common rail system fuel injector geometric parameters〖FL |
