Investigation of co-rotating vortex merger in ground proximity
Investigation of co-rotating vortex merger in ground proximity
复制标题
近地同转涡合并研究
DOI：
10.1016/j.ast.2016.03.017
复制
发表时间：
2016-06
影响因子：
5.6
通讯作者：
Qiulin Qu
中科院分区：
文献类型：
--
作者：
Yaping Wang;Peiqing Liu;Tianxiang Hu;Qiulin Qu
实验在水洞中进行，目的是研究地面效应中同向旋转尾涡的合并过程。根据实验结果，提出了相应的二维分析模型。在地平面上方产生了两个大小和强度相等的同号涡。利用粒子图像测速技术对下游一系列位置的涡对演化过程进行了研究。主要发现地面效应促进了涡的合并过程，加速了涡的旋转。垂直运动，称为涡反弹，和横向运动观察。地面效应还导致二次涡的出现，增加了涡系的复杂性。考虑了涡的衰减、粘性阻力和SV的演化，用修正的势流模型预测的结果与实验结果进行了比较。结果表明，该模型成功地预报了同向旋转涡对的涡合并和反弹，并改善了对涡的方向和横向运动的预报。
The experiments were conducted in a water tunnel facility and were aimed at investigating the merging process of co-rotating wake vortices in ground effect. A corresponding two-dimensional analytical model was also introduced based on experimental results. The two like-sign vortices were generated with equal size and strength above the ground plane. The evolution of vortex pair was attained by using particle image velocimetry at a series of downstream locations. The main finding is that the ground effect promotes the merging process and accelerates the vortices' rotation around one another. Vertical movements, known as vortex rebound, and lateral movements are observed. The ground effect also leads to the emergence of a secondary vortex (SV), which adds to the complexity of the vortex system. Prediction of the modified potential model, which takes vortex decay, viscous drag and the evolution of theSVinto account, is compared with the experimental data. The results show that the vortex merging and rebound of a co-rotating vortex pair is successfully predicted and the prediction of vortex orientation and lateral motion are also improved by this model.
登录
查看更多内容
影响因子：
2.2
作者：
L. K. Kliment;K. Rokhsaz
通讯作者：
L. K. Kliment;K. Rokhsaz
影响因子：
9.6
作者：
T. Gerz;F. Holzäpfel;D. Darracq
通讯作者：
T. Gerz;F. Holzäpfel;D. Darracq
影响因子：
4.6
作者：
H. Aref
通讯作者：
H. Aref
DOI：
10.2514/6.1976-415
发表时间：
1976-07
期刊：
--
影响因子：
--
作者：
V. Rossow
通讯作者：
V. Rossow
影响因子：
27.7
作者：
P. Spalart
通讯作者：
P. Spalart