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高压共轨大功率柴油机喷油嘴内部两相流动仿真研究

Simulative Study on the Flow in the Nozzle Hole of High-pressure Common Rail Injector of Large-power Diesel Engine
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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
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