| 燃油喷雾初始破碎及二次雾化机理的研究 |
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| 引用本文： | 魏明锐,沃傲波,文华. 燃油喷雾初始破碎及二次雾化机理的研究[J]. 内燃机学报, 2009, 27(2) |
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| 作者姓名： | 魏明锐 沃傲波 文华 |
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| 作者单位： | 魏明锐,WEI Ming-rui(武汉理工大学汽车工程学院,湖北,武汉430070);沃傲波,WO Ao-bo(华中科技大学能源与动力工程学院,湖北,武汉430074);文华,WEN Hua(南昌大学机电工程学院,江西,南昌330031) |
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| 摘 要： | 基于大涡模拟LES(large eddy simulation)理论和VOF(Volume of Fluid)方法,考察了燃油喷雾初始时刻即时间尺度为微秒级的液柱破碎过程,分析了初始破碎的机理,给出了该时间尺度下液柱初始破碎过程的模型;通过对一特定条件下的柴油机喷油器的建模和喷雾过程的大涡数值模拟,获得了液柱初始时刻"伞状头部"的喷雾形态,所得计算结果与相应的试验数据符合较好;数值模拟还直观地展现了液滴背风RT破碎、哑铃型破碎以及液滴的聚集融合等液滴的二次雾化过程.同时,也说明了大涡模拟这种准直接数值方法较之DDM(discrete droplets model)方法所具有的优势和潜力.
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| 关 键 词： | 雾化机理 二次雾化 大涡模拟 |
Investigation of the Initial Breakup and Secondary Atomization Mechanism of Fuel Spray |
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| WEI Ming-rui,WO Ao-bo,WEN Hua. Investigation of the Initial Breakup and Secondary Atomization Mechanism of Fuel Spray[J]. Transactions of Csice, 2009, 27(2) |
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| Authors: | WEI Ming-rui WO Ao-bo WEN Hua |
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| Affiliation: | 1.School of Automobile Engineering;Wuhan University of Technology;Wuhan 430070;China;2.School of Energy and Power Engineering;Huazhong University of Science and Technology;Wuhan 430074;3.School of Mechanical and Electronic Engineering;Nanchang University;Nanchang 330031;China |
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| Abstract: | Based on the theory of large eddy simulation(LES) and the method of VOF(Volume of Fluid),the initial breakup process of fuel liquid jet,which eject from the nozzle exit at the time scale of micro-second level,is investigated.The mechanism of primary atomization is analyzed,and the initial(at that time) breakup model of liquid jet is presented.By modeling and numerical simulation of atomization for a diesel nozzle under the given conditions,the initial umbrella-like spray shapes are obtained,which fits bette... |
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| Keywords: | VOF |
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