摘要
利用数字式PIV技术在阵风环境风洞中对Re=500时的圆柱绕流进行测量,给出了圆柱后2.2倍直径、圆柱两侧各一倍直径的区域内一系列瞬态的速度矢量场、涡量场和流线图。根据可视化图像和量化结果,着重分析了该区域的涡系结构和一个拟周期内旋涡的发展演化过程。
Measurements of flow around a circular cylinder at Re=500 in gust environmental wind tunnel have been carried out with Digital Particle Image Velocimetry (DPIV). A series of instantaneous velocity vectors, vorticities and stream line graphs are shown in the area behind the circular cylinder, 2.2 times of the diameter long and 2 times of the diameter wide. The vortex evolvement procedure around the circular cylinder in a pseudoperiod is discussed, as well as the typical vortex structures, according to the visualization pictures and qualitative data.
出处
《空气动力学学报》
CSCD
北大核心
2002年第4期379-387,共9页
Acta Aerodynamica Sinica
基金
国家自然科学基金资助项目(No.59876028)
