| 喷孔内流对射流初始扰动影响的大涡模拟研究 |
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| 引用本文： | 虞育松,李国岫,赵鹏. 喷孔内流对射流初始扰动影响的大涡模拟研究[J]. 工程热物理学报, 2010, 31(1) |
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| 作者姓名： | 虞育松 李国岫 赵鹏 |
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| 作者单位： | 北京交通大学机械与电子控制工程学院,北京,100044 |
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| 基金项目： | 国家自然科学基金项目资助(No.50776008);;新世纪优秀人才支持计划资助 |
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| 摘 要： | 本文利用大涡模拟方法对喷孔内流和近喷孔区域的燃油雾化过程进行数值模拟研究。为了能更加准确地模拟喷孔内流,本文根据实际喷油器结构设定了计算域,能够考虑针阀、油囊和喷孔结构对喷孔内流的影响。结果表明:在考虑了具体的喷油器结构参数情况下,采用气液两相流大涡模拟能够获得与实验非常接近的喷束结构;喷孔内流的非轴对称分布是引起射流非轴对称型扰动的原因;这种非轴对称扰动使喷束变为非轴对称结构。结果还显示这种非轴对称扰动具有远大于表面波的振幅和波长。
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| 关 键 词： | 大涡模拟 射流雾化 初始扰动 |
LARGE EDDY SIMULATION OF THE EFFECT OF NOZZLE INTERNAL FLOW ON SPRAY INITIAL PERTURBATIONS |
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| YU Yu-Song,LI Guo-Xiu,ZHAO Peng. LARGE EDDY SIMULATION OF THE EFFECT OF NOZZLE INTERNAL FLOW ON SPRAY INITIAL PERTURBATIONS[J]. Journal of Engineering Thermophysics, 2010, 31(1) |
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| Authors: | YU Yu-Song LI Guo-Xiu ZHAO Peng |
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| Affiliation: | School of Mechanical and Electronic Control Engineering;Beijing Jiaotong University;Beijing 100044;China |
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| Abstract: | In this paper,large eddy simulation(LES) methodologies are used to perform the study of nozzle internal flow and the spray atomization process near the nozzle exit.In order to achieve the better simulation of nozzle internal flow,the computed region is designed based on the detailed injector configuration parameters.Therefore,the effect of needle,sac and nozzle on nozzle internal flow could be considered.According to the simulated results,the spray configuration simulated by LES methodologies is considerabl... |
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| Keywords: | large eddy simulation spray atomization initial perturbations |
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