| 高压共轨喷嘴内部空化过程的两相流数值研究 |
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| 引用本文： | 李云清,成传松,赵立峰.高压共轨喷嘴内部空化过程的两相流数值研究[J].农机化研究,2010,32(1). |
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| 作者姓名： | 李云清 成传松 赵立峰 |
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| 作者单位： | 北京航空航天大学,交通科学与工程学院,北京,100191 |
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| 基金项目： | 国家自然科学基金项目(50376003) |
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| 摘 要： | 高压共轨喷油器喷嘴内的流动属性,尤其是喷孔出口截面上的湍流参数、射流速度以及液相的体积分数等参数对喷雾初次破碎所形成的油滴大小、速度有着重要影响,从而显著地影响喷雾雾化效果。为此,基于验证的欧拉两相流模型对上下两排喷孔式高压共轨喷嘴内空化过程进行了计算分析,并分析研究了针阀升程、喷射压力以及喷孔进口倒角、喷孔锥度等参数对喷嘴内空化过程的影响。计算结果表明,上排喷孔的空化程度要大于下排喷孔,并且适当的进口倒角、收缩型喷孔都能明显地抑制空化过程,但是射流湍动能下降而不利于雾化过程。
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| 关 键 词： | 高压共轨 喷嘴流动 空化 两相流 |
Numerical Investigation of Two-phase Flow in the Injector Nozzle of High Pressure Common Rail |
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| Li Yunqing,Chen Chuansong,Zhao Lifeng.Numerical Investigation of Two-phase Flow in the Injector Nozzle of High Pressure Common Rail[J].Journal of Agricultural Mechanization Research,2010,32(1). |
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| Authors: | Li Yunqing Chen Chuansong Zhao Lifeng |
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| Institution: | School of Transportation Science and Engineering/a>;Beihang University/a>;Beijing 100191/a>;China |
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| Abstract: | The size and velocity of droplets formed by the primary breakup and spray formation are significantly influenced by the nozzle flow of high pressure common rail injector,especially the turbulence intensity,injection velocity and volume fraction of fuel liquid on the exit section of nozzle. Base on the validated euler two-phase flow model,the numerical investigation was carried on the nozzle flow of high pressure common rail injector with two row nozzles and also the effect of needle lift,inject pressure,inl... |
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| Keywords: | high pressure common rail nozzle flow cavitation process two-phase flow |
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