Interplay of the leading-edge vortex and the tip vortex of a low-aspect-ratio thin wing

Interplay of the leading-edge vortex and the tip vortex of a low-aspect-ratio thin wing
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低展弦比薄翼前缘涡和尖端涡的相互作用

DOI:
10.1007/s00348-020-03023-4
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发表时间:
2020
影响因子:
2.4
通讯作者:
Dong L
Dong L
中科院分区:
工程技术3区
文献类型:
--
作者:
Dong L

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摘要采用粒子图像测速技术研究了低展弦比薄机翼上的三维涡旋结构及其相互作用。这种薄翼的最大升力是在迎角为。气流在前缘分离并重新附着在机翼表面,形成强大的前缘涡,对总升力起重要作用。结果表明:随着迎角的增大,叶顶涡诱导速度增大,有利于分离气流的重新附着,维持前缘涡的存在;由于前缘涡和叶顶涡之间的强烈相互作用,在前缘附近可以观察到以高雷诺应力为标志的湍流混合;然而,前缘涡的再附着点向上游靠近翼尖。图形抽象
AbstractThree-dimensional vortical structures and their interaction over a low-aspect-ratio thin wing have been studied via particle image velocimetry at the chord Reynolds number of. The maximum lift of this thin wing is found at an angle of attack of. The flow separates at the leading-edge and reattaches to the wing surface, forming a strong leading-edge vortex which plays an important role on the total lift. The results show that the induced velocity of the tip vortex increases with the angle of attack, which helps reattach the separated flow and maintains the leading-edge vortex. Turbulent mixing indicated by the high Reynolds stress can be observed near the leading-edge due to an intense interaction between the leading-edge vortex and the tip vortex; however, the reattachment point of the leading-edge vortex moves upstream closer to the wing tip.Graphic abstract
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发表时间: 1981
影响因子: 3.7
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