| 摘要:针对大功率柴油机循环喷油量较大的特点,设计了一种带蓄压腔式的电控喷油器。利用CFD软件对喷嘴内的燃油流动进行多维两相流建模,研究分析蓄压腔参数对喷嘴内流的影响。分析结果表明,随着节流孔面积的增大,孔内空化效应增强,燃油流速降低,出口流量减少；当蓄压腔容积增大时,空化效应增强,喷孔下游燃油的速度逐渐变小。 |
| 关键词: 高压共轨 蓄压腔 喷油器 流动特性 CFD |
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| Study on the Flow Characteristics ofAccumulator Injector of High-pressure Common Rail Diesel Engine |
| Liu Zhenming,OuYang Guangyao,An Shijie,Chang Hanbao |
| College of Naval Marine and Power Engineering, Naval University of Engineering, Hubei Wuhan 430033 |
| Abstract:According to the big flow characteristics of heavy duty diesel engine, the accumulator injector of common rail engine was designed. The CFD software was used to establish the multi-dimension two phase flow model of the fuel flow in the injector, and then the influence of accumulator parameters to fuel flow in injector was researched and analyzed. The results indicate that as the increasing of section area of the restriction orifice, the cavitation effect is strengthened, the flow rate is reduced and the discharge is decreased. As the cubage of the accumulator chamber is enlarged, the cavitation effect is strengthened and the fuel flow rate in injector orifice becomes slow. |
| Key words: high pressure common rail accumulator chamber injector flow characteristic CFD〖FL |
