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圆柱绕流三维不稳定性的低维Galerkin法分析
凌国灿; 常勇
Source Publication力学学报
1999
Volume31Issue:6Pages:652
ISSN0459-1879
Abstract利用低维Galerkin方法及Floquet稳定性分析理论,计算分析了圆柱绕流的三维线性不稳定性.分析中构造了能较好描述尾迹区流动的周向基函数,建立了完备的合理的基函数组,改进了计算机算法.结果证实圆柱二维周期流对展向小扰动为不稳定的,正确地预计了出现三维长波不稳定性的临界雷诺数Re_c=190,扰动展向波长为λ_c=3.6d.对雷诺数Re为180,190两种工况下的圆柱三维绕流流场的计算进一步证实了这种流动的整体不稳定性.该文所预计的临界值比Noack等人的结果更为精确,与Barkley等人的DNS解一致,与Williamson的实验相符.
Keyword圆柱绕流 三维线性不稳定性 Galerkin方法 Floquet稳定性
Subject Area力学
Indexed ByCSCD
Language中文
CSCD IDCSCD:703742
Citation statistics
Cited Times:3[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/17153
Collection力学所知识产出(1956-2008)
Recommended Citation
GB/T 7714		 凌国灿,常勇. 圆柱绕流三维不稳定性的低维Galerkin法分析[J]. 力学学报,1999,31,6,:652.
APA 凌国灿,&常勇.(1999).圆柱绕流三维不稳定性的低维Galerkin法分析.力学学报,31(6),652.
MLA 凌国灿,et al."圆柱绕流三维不稳定性的低维Galerkin法分析".力学学报 31.6(1999):652.
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