应用粒子图像速度场仪测试圆柱绕流涡的结构

摘要

利用粒子图像速度场仪(PIV)的2帧互相关技术,在风洞中测量雷诺数为500的圆柱绕流.通过展示一个涡的产生、发展及脱落的连续瞬时速度矢量场、流线图、速度量级等势线图和涡量等势线图,分析圆柱后涡系发展及涡量输运规律.%Flow around a circular cylinder at Re=500 in wind tunnel is measured by using 2-frame cross-correlation Particle Image Velocimetry(PIV).The progress and the transmittal disciplinarian of vortex behind circular cylinder are analyzed via the display of the velocity vectors graphs,streamline graph,velocities and vorticity graph with constant instantaneous velocity of a vortex's generation,progress and cast etc.,