平板上挡板前后涡核位置的测量

Measurements of Locations of Vortex Cores on a Plate Fitted with Fences in a Water Channel

在水洞中用氢气泡法对平板上挡板前后的涡核位置进行了测量。本试验旨在确定挡板高度及其雷诺数对涡核位置的影响。结果表明，（ａ）对于单个挡板情况，涡核离开平板的高度和涡核与挡板的距离将随着挡板的高度增加而增加，但涡核的高度和距离与挡板高度的比例随挡板高度的增加而降低；（ｂ）对于两个挡板情况，挡板的高度和挡板之间的距离对涡核位置的影响是主要的。

Vortex cores on a plate with (a) one fence and (b) two fences positioned in the test section of a single-circuit water channel are located using hydrogen bubbles. The purpose of this experiment is to determine the influence of the height of the fences and the Reynolds Number (Re) on the position of the vortex cores.The results show that (a) with one fence,the height of the vortex core and its distance from the fence tend to increase with an increase in the fence's height,but their ratios to the fence's height tend to decrease with an increase in the Re; (b)with two fences,the heights of the fences and the distance between them are the main factors influencing the position of the vortex cores.