| 壁面局部粗糙对大涡结构作用的非线性演化研究 |
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| 引用本文： | 陆昌根,武丰民,吴卫国,陈耀登. 壁面局部粗糙对大涡结构作用的非线性演化研究[J]. 南京气象学院学报, 2009, 32(5): 667-672 |
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| 作者姓名： | 陆昌根 武丰民 吴卫国 陈耀登 |
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| 作者单位： | 1. 南京信息工程大学气象灾害省部共建教育部重点实验室.江苏,南京,210044
2. 江苏省高淳县委,江苏高淳,211300 |
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| 基金项目： | 国家自然科学基金资助项目，江苏省自然科学基金资助项目，南京信息工程大学科研基金资助项目 |
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| 摘 要： | 在构建大涡结构理论模型的基础上,采用局部喷入和吸出的结构来模拟局部粗糙壁面诱导的感应扰动场,数值研究局部粗糙对大涡结构之间非线性作用的影响问题。数值结果表明,局部粗糙壁面诱导的感应扰动改变了原平均速度剖面的稳定性特性及感应扰动流场的三维性对激励大涡结构的快速增长起了关键性的作用。
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| 关 键 词： | 数值模拟 局部粗糙 大涡结构 平均速度剖面 三维性 |
Nonlinear Evolution of the Effect of Local Rough Wall on Large Eddy Structure |
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| LU Chang-gen,WU Feng-min,WU Wei-guo,CHEN Yao-deng. Nonlinear Evolution of the Effect of Local Rough Wall on Large Eddy Structure[J]. Journal of Nanjing Institute of Meteorology, 2009, 32(5): 667-672 |
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| Authors: | LU Chang-gen WU Feng-min WU Wei-guo CHEN Yao-deng |
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| Affiliation: | LU Chang-gen, WU Feng-min ,WU Wei-guo, CHEN Yao-deng ( 1. Key Laboratory of Meteorological Disaster of Ministry of Education,NUIST,Nanjing 210044,China 2. Gaochun County Party Committee of Jiangsu Province,Gaochun 211300,China) |
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| Abstract: | Based on a theoretical model for large eddy structure.the basic disturbance flow induced by the localized rough wall was simulated by distributing localized suction and blowing,to investigate the nonlinear effect of the local roughness on the large eddy structure.Numerical results show that the sta-bility of the basic velocity profile is changed by the basic disturbance flow induced by localized rough wall,and the three-dimensionality of the basic disturbance flow plays a key role in the rapidly growth of the large eddy structure. |
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| Keywords: | numerical simulation local roughness large eddy structure basic velocity profile three-dimensionality |
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