| 二并列方柱绕流的大涡模拟 |
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| 引用本文： | 王小华,何钟怡.二并列方柱绕流的大涡模拟[J].哈尔滨建筑大学学报,2002,35(2):49-53. |
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| 作者姓名： | 王小华 何钟怡 |
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| 作者单位： | 哈尔滨工业大学市政环境工程学院,黑龙江,哈尔滨,150090 |
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| 摘 要： | 在相关文献的基础上发展了二阶全展开ETG有限元计算格式，并与湍流的大涡模拟技术（LES）相结合，对雷诺数为10000条件下的二并列方柱绕流的流场进行了数值,重点在于较好地捕捉低频大尺度旋涡及其随时间的演变。对于若干指定点，给出了压应力的时域过程并进行了频谱分析。结果表明，在边界条件完全对称的前提下，对称点压应力的频谱并不相同，但差别主要集中在频率略高，含能甚少的频段。
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| 关 键 词： | 钝体绕流 大涡模拟 二阶全展开ETG有限元 对称边界条件 时域过程 谱分析 |
| 文章编号： | 1006-6780(2002)02-0049-05 |
| 修稿时间： | 2001年7月9日 |
Large eddy simulation of flow round two square cylinders arranged side by side |
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| WANG Xiao-hua,HE Zhong-yi.Large eddy simulation of flow round two square cylinders arranged side by side[J].Journal of Harbin University of Civil Engineering and Architecture,2002,35(2):49-53. |
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| Authors: | WANG Xiao-hua HE Zhong-yi |
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| Abstract: | Based on the given references,the second order full expansion ETG finite element method is developed,and combined with the large eddy simulation(LES)technique to simulate the flow round two square cylinders arranged side by side at Re =10,000.The objective of this method is to capture large scale eddies and the variation of eddies with time.Consequently,the time domain process of pressure at the given points and the analysis of their spectrum are completed.It is concluded the pressure process at the given symmetric points on the surface of the two cylinders with symmetrical boundary condotions are asymmetric,but the differences are focused on the band of higher frequency with little energy. |
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| Keywords: | flow round a blunt body large eddy simulation second order fully expension ETG finite element symmetrical boundary condition time domain process spectrum analysis |
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