前置隔板对圆柱绕流影响的实验分析

Journal of Beijing University of Aeronautics and Astronautics(2016)

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Abstract
对经典的圆柱绕流模型,运用前置隔板对流场进行控制.利用粒子图像测速(PIV)方法在自循环水槽中研究了雷诺数为1 800时,柔性和刚性2种不同刚度的前置隔板对圆柱绕流的影响.研究发现:柔性隔板自由端的弯曲增加了对流场的额外扰动,并且柔性隔板弯曲变形会诱导产生脱落涡,导致尾迹流场的主频发生变化.在圆柱下游流场,无隔板工况与柔性隔板工况的回流区长度相当,刚性隔板工况的回流区相较之下则更长.结果显示:前置隔板还能在一定程度上减小圆柱绕流的阻力.
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Key words
circular cylinder,plate,flow
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