| 喷油压力波动对喷嘴内空穴发展影响的CFD分析 |
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| 引用本文： | 何志霞,王谦,袁建平,李德桃. 喷油压力波动对喷嘴内空穴发展影响的CFD分析[J]. 内燃机工程, 2009, 30(1) |
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| 作者姓名： | 何志霞 王谦 袁建平 李德桃 |
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| 作者单位： | 1. 江苏大学能源与动力T程学院,镇江,212013
2. 江苏大学流体机械工程技术中心 |
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| 摘 要： | 柴油机喷嘴内部空穴流动是造成喷孔出口燃油初次雾化的重要原因之一,影响喷雾特性,进而影响柴油机的燃烧及排放性能.而实际柴油机喷油系统中的喷油压力往往存在波动,使得喷嘴内部空穴流动现象更为复杂.针对垂直多孔喷嘴,利用混合多相流空穴模型,进行了喷嘴内部气液两相瞬态流动的三维数值模拟,深入分析了不同频率及不同波形的入口压力波动对喷嘴内部流动空穴发展过程的影响.分析得出,空穴有其自己的时间和长度尺度.
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| 关 键 词： | 内燃机 柴油机 喷嘴 压力波动 空穴 三维数值模拟 CFD分析 |
CFD Analysis for Effect of Injection Pressure Fluctuation on Cavitating Flow in Diesel Engine Nozzle |
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| HE Zhi-xia,WANG Qian,YUAN Jian-ping,LI De-tao. CFD Analysis for Effect of Injection Pressure Fluctuation on Cavitating Flow in Diesel Engine Nozzle[J]. Chinese Internal Combustion Engine Engineering, 2009, 30(1) |
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| Authors: | HE Zhi-xia WANG Qian YUAN Jian-ping LI De-tao |
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| Affiliation: | 1.School of Energy Resources and Power Engineering;Jiangsu University;Zhenjiang 212013;China;2.Research Center of Fluid Machinery and Engineering;Jiangsu University |
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| Abstract: | The cavitating flow in diesel engine nozzle holes is an important factor affecting the primary spray break-up and the spray characteristics,which will eventually affect the combustion and emission.In the fuel injection system,the injection pressure is always fluctuant,which makes the cavitating flow in the nozzle more complicated.The three-dimension numerical simulation of two-phase transient cavitating flow in nozzle holes for a vertical multi-hole injector was carried out by using a mixed multi-phase cavi... |
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| Keywords: | IC engine diesel engine nozzle injection pressure fluctuation cavitation three-dimension numerical simulation CFD analysis |
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