L型定向风帽流化床中气泡特性的可视化研究

Visualized Research on the Characteristic of Bubbles in a Fluidized Bed with L-Type Wind Cap

使用CCD相机连续跟踪气泡的运动过程,将拍摄的数字图像进行处理,从而得到气泡沿床层高度方向形状、尺寸的变化.根据拍摄的连续图像,与标定值比较可以确定气泡在床中的实际位置,从而得到气泡的运动轨迹.

The moving progress of bubbles is continuously traced by CCD (Charge Coupled Device) camera, the digital photographs are captured when the experiment is dealt with by using image processing technology, then the shape and scale of bubbles along the height can be obtained. In terms of those continuous photographs, and comparing with the calibration value, the real situation of bubbles in the bed can be determined, then the trajectories of bubbles can be obtained.