Knowledge Management System of Institue of Mechanics, CAS
| A numerical analysis of vortex dislocation in wake-type flow with different spanwise nonuniformity | |
Ling GC(凌国灿)
| |
| 2005 | |
| Keyword | Direct numerical simulation Transition behavior Two distinct types of vortex dislocation Wake-type flow |
| Other Abstract | Two distinct types of vortex dislocation generated in wake-type flows with different spanwise nonuniformities are numerically studied by DNS. A local spanwise disturbance to the velocity of the coming flow leads to generation of consecutive twisted chain-like vortex dislocations in the middle downstream, which is mainly caused by phase difference between vortex shedding cells, while a stepped variation of velocity in the coming flow yields a periodic vortex splitting-reconnection to form a spot-like dislocation, which is mainly caused by frequency difference between 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 with vortex dislocations are analyzed. © 2005 by World Scientific Publishing Co. Pte. Ltd. All rights reserved. |
| Source Publication | Vortex Dominated Flows: A Volume Celebrating Lu Ting's 80th Birthday |
| Pages | 157-187 |
| Publisher | World Scientific Publishing Co. |
| Language | 英语 |
| ISBN | 9789812703439 |
| Document Type | 图书章节 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/85087 |
| Collection | 力学所知识产出(1956-2008) |
| Affiliation | The State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100080, China |
| Recommended Citation GB/T 7714 | Ling GC. A numerical analysis of vortex dislocation in wake-type flow with different spanwise nonuniformity[Ch]. Vortex Dominated Flows: A Volume Celebrating Lu Ting's 80th Birthday,World Scientific Publishing Co.,2005. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| ChpA018.pdf（311KB） | 图书章节 | 开放获取 | CC BY-NC-SA | View Application Full Text | ||
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