.png){kind=icon}
返回
Vortex formation on squared and rounded tip
.png){kind=icon}
OA
AI
DOI：10.1016/j.ast.2013.03.004.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
The vortical flow originated from the tip of a NACA 0012 rectangular wing is described in its initial formation and development over a rounded and a squared tip. Smoke visualizations show the rolling-up kinematic and evolution of the vortical systems moving the plane towards the trailing edge. The presence of intense secondary vortices affects the primary vortex unsteadiness and shape during the formation and in the early wake. Stereoscopic Particle Image Velocimetry is used to describe vorticity, axial velocity and turbulent kinetic energy distributions of the vortex during the formation and in the early wake at different angles of attack of the wing. The rolling-up of the vorticity sheet around the vortex system is strongly influenced by the vortex shape and the intensity of secondary vortices. Turbulence coming from secondary structures and shear layers is wrapped into the roll-up of the vortex and high levels of turbulence are measured in the vortex core. However, a laminar vortex core is observed for the lower angle of attack in the early wake. Comparing the meandering of the vortex for the two wingtip geometries, two different sources of the vortex fluctuation in the wake are identified: the interaction of secondary vortices moving around the primary vortex and the rolling-up of the vorticity sheet. Lastly, measurements in the wake of the wing at zero incidence are also presented showing a distinctive counter rotating vortex pair. (C) 2013 Elsevier Masson SAS. All rights reserved.
Keyword:
Wingtip vortex
Smoke visualization
Stereoscopic Particle Image Velocimetry
Wingtip geometry
Vortex merging
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
5.8
论文数:
1.0W
被引数:
3.0W
机构
引用论文
Generation of recombinant rabies virus ERA strain applied to virus tracking in cell infection重组狂犬病病毒ERA株的生成及其在细胞感染中病毒追踪的应用OAAI
OAAI分享收藏分享收藏Effect of metabolic uncoupler, 2,4-dinitrophenol (DNP) on sludge properties and fouling potential in ultrafiltration membrane process.代谢解偶联剂2,4-二硝基苯酚（DNP）对超滤膜过程中污泥性质和污染潜力的影响。.png)
IF0
PREAI
分享收藏分享收藏
查看更多内容