【摘要】 采用数字粒子图像测速技术(digitalparticleimagevelocimetry,DPIV)以氢气泡为示踪粒子,对圆柱绕流流场进行了测试.DPIV拍摄时相机通常是固定的,文中采用坐标转换的方法可达到相机随来流运动的效果,从而将显示不出来的涡在变换后的参考坐标系下显示出来.采用计算机模拟进一步证实了这种方法的正确性.更多还原

【Abstract】 In the paper ,we adopt DPIV technique and use hydrogen bubble as a trace particle to study column circuitous flow. Generally, in DPIV, when take photo the camera is fixed. A simple method is adopted to get the result that camera is moving together, thus on the transformed axis, we show the vortex that is invisible on primary axis. Additionally, we use computer simulation test to approve the validity of this method.更多还原