| 柴油机喷嘴空穴流动特性分析 |
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| 引用本文： | 王谦,柏金,何志霞,穆青木. 柴油机喷嘴空穴流动特性分析[J]. 车用发动机, 2010, 0(3) |
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| 作者姓名： | 王谦 柏金 何志霞 穆青木 |
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| 作者单位： | 江苏大学能源与动力工程学院,江苏,镇江,212013 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 利用混合多相流空穴模型进行了喷嘴内气液两相流动的数值模拟。分析了喷油压力、背压、喷嘴几何特征参数对喷孔内空穴流动、空穴区域分布的影响,以及各种参数对流量系数和燃油出口平均速度的影响。研究结果表明,无量纲空穴数直接影响喷孔内的空穴分布,而流量系数和燃油出口平均速度等流动特性则与喷油压力、喷孔入口圆角半径、喷孔倾角、针阀升程等几何特征参数有很大关系。
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| 关 键 词： | 柴油机 喷嘴 空穴 两相流 燃油雾化 数值模拟 |
Cavitating Flow Characteristics in Diesel Nozzle |
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| WANG Qian,BAI Jin,HE Zhi-xia,MU Qing-mu. Cavitating Flow Characteristics in Diesel Nozzle[J]. Vehicle Engine, 2010, 0(3) |
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| Authors: | WANG Qian BAI Jin HE Zhi-xia MU Qing-mu |
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| Affiliation: | WANG Qian,BAI Jin,HE Zhi-xia,MU Qing-mu (School of Energy , Power Engineering,Jiangsu University,Zhenjiang 212013,China) |
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| Abstract: | With the mixed multi-phase cavitating flow model,the gas and liquid two-phase flow in the nozzle was simulated.The influences of injection pressure,back pressure and nozzle geometry characteristics on cavitating flow and distribution inside the nozzle were analyzed.Also,the influences of various parameters on discharge coefficient and average fuel exit speed were analyzed.The results show that the nondimensional cavitation parameter influences directly on cavity distribution in the nozzle.In addition,the in... |
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| Keywords: | diesel engine nozzle cavity two-phase flow fuel spray numerical simulation |
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