【摘要】 本文研究了绕流等边三角形排列三圆柱的气动力及其相互干扰。针对某一特定的中心距(1.75d,d为圆柱直径),进行了压力分布的测量和气动力的推算。结果表明,在这种间距下干扰是严重的,除阻力之外,还产生了相当大的横向力,而且随着风向的改变,这种横向力可能是相斥的,也可能是相吸的。另外,圆柱的局部表面有极强的负压力系数。更多还原

【Abstract】 In this paper, the flow interference of fluid between three equidistant circular cylinders has been investigated. The distant between each two centers of two cylinders on the base is 1.75 times the diameter of the cylinder, three cylinders being of the same size. Experiments were held such that the pressure distribution of the flow between cylinders was measured and the aerodynamic forces of the flow were measured. It is found that the flow interference besides the drag force is serious and that there exists the lateral force acting on the cylinders, these lateral forces may be repulsive or attractive according to the direction of the wind flow, And it is also found that some of the local regions of the cylinders may be suffered very strong negative pressure.更多还原