| 两相圆湍射流颗粒弥散与速度相似性大涡模拟 |
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| 引用本文： | 王兵,张会强,王希麟.两相圆湍射流颗粒弥散与速度相似性大涡模拟[J].航空动力学报,2009,24(7):1464-1469. |
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| 作者姓名： | 王兵 张会强 王希麟 |
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| 作者单位： | 清华大学 航天航空学院 北京市3E能源重点实验室, 北京 100084 |
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| 基金项目： | 国家自然科学基金(50706021);;高校博士点基金(20070003018) |
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| 摘 要： | 气相采用大涡模拟方法、颗粒相采用拉格朗日轨道模型,对高雷诺数两相圆湍射流进行了数值模拟,研究了一种中等Stokes颗粒在大尺度涡结构中弥散特点以及两相速度统计特征.研究表明,颗粒弥散同时受流动涡结构和颗粒惯性决定,颗粒在涡结构的边缘或者涡与涡交织区域颗粒数密度高,形成倾向性分布.沿中心轴线两相平均速度衰减不同,颗粒相速度衰减慢于气相.射流近场两相速度沿径向变化显著,在射流远场两相平均速度都具有相似性,沿径向颗粒相平均速度衰减慢、分布平稳.
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| 关 键 词： | 大涡模拟 两相圆湍射流 颗粒倾向性分布 速度相似性 |
| 收稿时间： | 7/1/2008 5:47:28 PM |
| 修稿时间： | 1/5/2009 8:38:06 PM |
Large-eddy simulation of particle dispersion and velocity similarity in a two-phase round turbulent jet |
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| WANG Bing,ZHANG Hui-qiang and WANG Xi-lin.Large-eddy simulation of particle dispersion and velocity similarity in a two-phase round turbulent jet[J].Journal of Aerospace Power,2009,24(7):1464-1469. |
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| Authors: | WANG Bing ZHANG Hui-qiang and WANG Xi-lin |
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| Institution: | Beijing 3E Energy Key Laboratory, School of Aerospace, Tsinghua University, Beijing 100084, China |
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| Abstract: | A high-Reynolds two-phase round turbulent jet was numerically simulated by means of large eddy simulation for gas-phase and particle trajectory model for particle-phase.The dispersion behavior of particles with median Stokes number in large scale structures was studied.Two-phase statistical velocities were compared with each other.It's shown that particle dispersion is dominated both by large eddy structures and particle inertia,resulting in a high particle concentration distribution in the edge of vortex s... |
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| Keywords: | large-eddy simulation two-phase round turbulent jet particle preferential distribution velocity similarity |
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