摘要
基于立轴涡旋理想模型结合漏水及水泵冲击方法精巧设计了抽水进水平台,利用该装置生成稳定且可控的流体涡旋.采用跟踪流体运动的示踪粒子、激光器、CCD相机等器材构成本实验的测量系统,利用Virtual Dub软件处理视频得到连续分帧的清晰像,通过PIV粒子图像测速技术对摄取图像进行处理,得到不同高度、距离涡旋中心不同距离的三维平面内的涡度、速度环量等涡旋相关物理量的具体数据.结果表明:对于同一稳定流体涡旋,越靠近涡旋中心,流速越小,涡度越大;涡旋高度越高,涡旋表面速度越小.
Based on the ideal mathematical model of vertical vortex,combinedwith the method of water leakage and water pump impact,a pumping water inlet platform was designed elaborately,and a stable and controllable fluid vortex was generated by using the platform.The measuring system of the vortex was composed of tracer particles,lasers,CCD cameras and other devices to track the fluid movement.The specific data of vortex related physical quantities such as vorticity and velocity circulation in three-dimensional planes with different height and distance from thevortexcenter wereobtained by PIV particle image velocimetry technology and were used to process the captured image acquired fromthe video by Virtual Dub software.The results showed that for the same stable fluid vortex,the closer it was to the vortex center,the smaller the velocity was,the greater the vorticity was;and the higher the vortex height was,the smaller the vortex surface velocity was.
作者
吴佩芳
张润生
杜淼
吴利灿
刘宇帆
邵志刚
WU Pei-fang;ZHANG Run-sheng;DU Miao;WU Li-can;LIU Yu-fan;SHAO Zhi-gang(National Demonstration Center for Experimental Physics Education,School of Physics and TelecommunicationEngineering,South China Normal University,Guangzhou 510006,China)
出处
《物理实验》
2020年第4期54-58,61,共6页
Physics Experimentation
基金
国家自然科学基金面上项目资助(No.11774100)
广东省自然科学基金项目资助(No.2018A030313322)。
