Numerical analysis of two distinct types of vortex dislocation in wake-type flows with different spanwise nonuniformities
文献类型：会议论文
| 作者 | Ling GC(凌国灿) ; Niu JY(牛家玉)
|
| 出版日期 | 2005 |
| 会议名称 | 3rd M.I.T. Conference on Computational Fluid and Solid Mechanics |
| 会议日期 | June 14, 2005 - June 17, 2005 |
| 会议地点 | Boston, MA, United states |
| 关键词 | Flow quantities Frequency differences Local irregularities Non-uniformities Phase difference Proper orthogonal decomposition method Transition behavior Vortex dislocation Vortex dislocations Wake flows Wake-type flow |
| 中文摘要 | Two distinct types of vortex dislocation generated in wake-type flows with different spanwise nonuniformities are numerically studied by direct numerical simulation (DNS). A local spanwise disturbance to the velocity of the oncoming flow leads to a generation of consecutive twisted vortex dislocations in the middle downstream, which is mainly caused by phase differences among vortex-shedding cells. A stepped variation of velocity in the oncoming flow yields a periodic vortex splitting-reconnection type of dislocation, which is mainly caused by frequency differences among the shedding cells. Dynamics and main features of these dislocations, especially the vortex linkages over the dislocations, are clearly described by tracing the substantial modification of vorticity lines and other key flow quantities. Local irregularities in the variations of velocity, vorticity and frequency, and transition behavior of the wake flows are analyzed by wavelet analysis and the proper orthogonal decomposition (POD) method. © 2005 Elsevier Ltd. |
| 收录类别 | EI |
| 会议录 | 3rd M.I.T. Conference on Computational Fluid and Solid Mechanics
 |
| 语种 | 英语 |
| ISBN号 | 080444814 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/60284]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Ling GC,Niu JY. Numerical analysis of two distinct types of vortex dislocation in wake-type flows with different spanwise nonuniformities[C]. 见:3rd M.I.T. Conference on Computational Fluid and Solid Mechanics. Boston, MA, United states. June 14, 2005 - June 17, 2005. |
入库方式： OAI收割
来源：力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。