高雷诺数下三圆柱的压力分布及气动力

PRESSURE DISTRIBUTION AND AERODYNAMIC FORCE OF THREE CYLINDERS AT HIGH REYNOLDS NUMBER

给出了三种粗糙表面的单圆柱压力分布和五种风向角下三圆柱的压力分布，分析了各状态下圆柱绕流特征和气动力。结果表明：三圆柱间的干扰是严重的，各圆柱表面的压力分布不同于孤立单圆柱，相对于来流明显不对称，由此产生了很大的横向力，而且，局部表面的负压比孤立单圆柱要大。

Pressure distribution of a single circular cylinder in three surface roughness condition and that of three circular cylinders arranged as a equilateral triangle at five wind incidences were meas-ured. The flow around circular cylinders and aerodynamic forces have been studied. The results show that the flow interference is serious among three circular cylinders. The pressure distribution changes much than that of the single cylinder. Some area of the cylinders surface may be suffered very strong negative pressure. In some situations, large lateral forces act on the cylinders.