VORTICES IN SPHERE WAKES
VORTICES IN SPHERE WAKES
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DOI：
10.1139/p65-154
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发表时间：
1965-01-01
影响因子：
1.2
通讯作者：
MACLATCHY, CS
中科院分区：
文献类型：
--
作者：
MAGARVEY, RH;MACLATCHY, CS
本文研究了雷诺数从200到500范围内的球形尾流的旋涡特征的形成和结构。涡量释放到自由流中的方式已从摄影证据中推断出来。已经发现，在所考虑的雷诺数的整个范围内，至少有一部分在边界层中产生的涡量是通过一个卷入的片传递到气流中的。该片被回流流体连续地扭曲，并作为尾流涡元的分界面重新出现。螺旋路径被认为是与相对于上游-下游轴的球体的不对称性。
The formation and structure of vortices characteristic of sphere wakes corresponding to a range of Reynolds numbers extending from 200 to 500 have been examined. The manner in which vorticity is released to the free stream has been deduced from the photographic evidence. It has been found that, over the entire range of Reynolds numbers considered, at least part of the vorticity generated in the boundary layer is transferred to the stream by means of an involved sheet. This sheet is distorted continuously by the backflowing fluid and reappears as the demarcating surface of the vortex elements of the wake. The spiraling path was found to be associated with the asymmetry relative to the upstream–downstream axis of the sphere.