【摘要】 采用以氢气泡为示踪粒子的数字粒子图像测速技术(digitalparticleimagevelocimetry,DPIV)对三种不同雷诺数下的圆柱绕流进行了研究。一般DPIV拍摄时相机固定,可得出一种速度场分布。笔者采用静止坐标,用简单的方法可以达到相机随流场移动的效果,DPIV处理结果可以看到一些更深入的情况。更多还原

【Abstract】 A DPIV technique using hydrogen bubble is adopted to study flow around column under three different Reynolds number in the paper. The camera is generally fixed in DPIV. In the paper a simple method adopting static coordinate system is introduced to get the results as camera is moving together with free flow. Some further view of flow can be obtained by the method.更多还原