Three-dimensional wake structures controlled by the flow issuing from a horizontal hole in a wall-mounted short cylinder
Three-dimensional wake structures controlled by the flow issuing from a horizontal hole in a wall-mounted short cylinder
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三维尾流结构由从壁挂式短圆柱体中的水平孔流出的流动控制
DOI：
10.1016/j.oceaneng.2021.109938
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发表时间：
2021-11
影响因子：
5
通讯作者：
Masato Akamatsu
中科院分区：
文献类型：
--
作者：
Hiroka Rinoshika;Akira Rinoshika;Masato Akamatsu
本文研究了壁挂式短圆柱体引起的三维 (3D) 尾流结构。该结构由从气缸前部到后部钻出的水平孔 (HH) 发出的流量控制。使用高分辨率断层粒子图像测速 (Tomo-PIV) 在水隧道中以 10,720 的雷诺数瞬时测量 3D 速度场。基于测量的瞬时 3D 速度场，比较了 HH 圆柱体和标准圆柱体的 3D 涡度场、Q 准则以及拱形涡流和尖端涡流的特性。短 HH 圆柱体后面出现 3D W 型拱形涡旋。与标准圆柱相比，3D W型拱形涡和大尺度涡在HH圆柱的尾迹中分解得更快。来自HH的流量可将后再循环区域减少至15%，有效控制短气缸的尾流结构。 3D 小波多分辨率分析用于分解 Tomo-PIV 数据给出的 3D 速度场。 HH圆柱尾流中的大尺度流向涡比标准圆柱尾流中的大尺度流向涡要小，并且随着孔高度的增加，这一点变得更加明显。中等规模的涡流也受到从孔中流出的流动的控制。
This paper examines the three-dimensional (3D) wake flow structures induced by a wall-mounted short circular cylinder. The structures are controlled by the flow issuing from a horizontal hole (HH) drilled from the front to the rear of the cylinder. The 3D velocity fields are instantaneously measured at a Reynolds number of 10,720 using high-resolution tomographic particle image velocimetry (Tomo-PIV) in a water tunnel. The 3D vorticity fields,Qcriterion, and characteristics of arch-type and tip vortices are compared between the HH cylinders and a standard cylinder based on the measured instantaneous 3D velocity fields. A 3D W-type arch vortex appears behind the short HH cylinders. Compared with the standard cylinder, the 3D W-type arch vortex and large-scale vortices break down more rapidly in the wake of the HH cylinders. The flow from the HH may reduce the rear recirculation region to 15%, effectively controlling the wake structures of short cylinders. A 3D wavelet multiresolution analysis is used to decompose the 3D velocity fields given by the Tomo-PIV data. The large-scale streamwise vortices in the HH cylinder wakes are smaller than those in the standard cylinder wake, and this becomes more evident as the hole height increases. The intermediate-scale vortices are also controlled by the flow issuing from the hole.
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影响因子：
0.8
作者：
Hiroka Rinoshika;A. Rinoshika;S. Fujimoto
通讯作者：
Hiroka Rinoshika;A. Rinoshika;S. Fujimoto
后斜孔壁挂式短圆柱背后的三维流动结构
影响因子：
2.5
作者：
Hiroka Rinoshika;Akira Rinoshika;Yan Zheng;Masato Akamatsu
通讯作者：
Masato Akamatsu
影响因子：
3.7
作者：
S. Gildersleeve;M. Amitay
通讯作者：
S. Gildersleeve;M. Amitay
影响因子：
2.4
作者：
R. Pattenden;S. Turnock;Xin Zhang
通讯作者：
R. Pattenden;S. Turnock;Xin Zhang
DOI：
10.1299/jsme1958.27.2142
发表时间：
1984-10
期刊：
--
影响因子：
--
作者：
T. Kawamura;M. Hiwada;Toshiharu Hibino;I. Mabuchi;M. Kumada
通讯作者：
T. Kawamura;M. Hiwada;Toshiharu Hibino;I. Mabuchi;M. Kumada