| 柴油机喷油器内部空化效应的模拟研究 |
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| 引用本文： | 魏起森,杨铁皂,杜青.柴油机喷油器内部空化效应的模拟研究[J].河南科技大学学报(自然科学版),2011,32(5):24-27. |
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| 作者姓名： | 魏起森 杨铁皂 杜青 |
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| 作者单位： | 1. 河南科技大学车辆与动力工程学院,河南洛阳,471003
2. 天津大学内燃机燃烧学国家重点实验室,天津,300072 |
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| 基金项目： | 国家自然科学基金项目(50876072) |
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| 摘 要： | 喷油器中空化流特性直接影响燃油的雾化和燃烧.利用CFD-Fire软件,在针阀运动的情况下模拟了喷油器内部从单相流到超空化的过程以及流动特征.数值模拟发现:气泡首先出现在喷孔进口的拐角处,随着流速增加,空化进一步发展,直至贯穿整个喷油器形成超空化,整个流场成为气液两相流.瞬态条件下,针阀运动致使喷孔进口附近压力波动,部分...
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| 关 键 词： | 喷油器 数值模拟 空化 瞬态 压力波动 |
Numerical Simulation of Cavitating Flow in Diesel Nozzle |
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| WEI Qi-Sen,YANG Tie-Zao,DU Qing.Numerical Simulation of Cavitating Flow in Diesel Nozzle[J].Journal of Henan University of Science & Technology:Natural Science,2011,32(5):24-27. |
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| Authors: | WEI Qi-Sen YANG Tie-Zao DU Qing |
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| Institution: | WEI Qi-Sen1,YANG Tie-Zao1,DU Qing2(1.Vehicle & Motive Power Engineering School,Henan University of Science & Technology,Luoyang 471003,China,2.State Key Laboratory of Engines,Tianjin University,Tianjin 300072,China) |
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| Abstract: | Cavitating flow in diesel nozzle affects diesel fuel spray and combustion characteristic.The flow field change model in SAC type nozzle hole was performed by computational fluid dynamics software when needle valve was moving.The results show that the cavitation appears initially at the nozzle hole inlet edge,and it is developed when the diesel fuel increases speed.Ultimately,the cavitation bubble through the nozzle hole forms supercavitation,and the flow field is divided into two-phase flow in nozzle hole.U... |
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| Keywords: | Nozzle Numerical simulation Cavitation Unsteady condition Pressure fluctuation |
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