基于MATLAB的泄洪洞气泡运动轨迹检测

Detection for Motion Tracks of Bubbles in Spillway Tunnel Based on Matlab

针对高水头泄洪洞气泡运动轨迹难以测定的情况,设计并制造了比尺为1∶100的雅砻江锦屏一级水电站泄洪洞模型,首次采用图像测量方法对泄洪洞内气泡沿程运动特性进行测量。使用高速摄像机拍摄到清晰的气泡运动图像序列,并利用MATLAB图像处理方法实现了对流场中气泡的分割识别,得到气泡的面积、形心等参数,并进一步获取了泄洪洞流场中单个气泡运动轨迹。

For the high-head flow in a spillway tunnel, it is difficult to determine the moving behavior of gas bubbles. A 1 ： 100 scale model of the spillway tunnel of Jinping Ⅰ Hydropower Station is designed and made, and first using image measurement method, the behavior of the bubble motion in the spillway tunnel is measured. A high speed camera is used here for taking the high definition image of bubbles. The image processing method with MATLAB is used to realize the segment and recognition for the bubbles in flow field, to gain the parameters of the bubbles such as the area, center coordinate and so on. Furthermore, the motion track of a single bubble in flow field of the spillway tunnel is obtained.