高雷诺数时串列双圆柱平均压力的实验研究  

Time-Mean Pressure on the Surface of Two Circular Cylinders in Tandem Arrangements at High Reynolds Numbers

作　　者：顾志福[1] 孙天风[1] 林荣生[1] 

机构地区：[1]北京大学,北京100871

出　　处：《空气动力学学报》1997年第3期393-399,共7页Acta Aerodynamica Sinica

基　　金：国家自然科学基金

摘　　要：通过风洞实验给出了二维串列双圆柱在高雷诺数时（分别为Re＝2．10×105和Re＝4．52×105）的平均压力分布。实验在低湍流度的均匀流中进行，模型表面光滑。实验结果发现；在亚临界雷诺数时串列双圆柱临界间距时有一些新的现象；在超临界雷诺数时串列双圆柱的平均压力分布显示出与亚临界雷诺数时截然不同的特性。就总体而言，超临界雷诺数时前后住间的相互干扰要比亚临界时小得多。Time-mean pressure distributions on the surface of two circular cylinders of the same diameter in tandem arrangements at high Reynolds numbers (Re =2. 100×105 and Re = 4. 52×105 respectively) are presented. The experiments were carried out in low turbulent smooth flow.At the subcritical Reynolds number (Re=2.10×105), the results coincide with the literature published previously and bistable pressure distributions on two circular cylinders were obtained at the critical spacing ratio N/d=3.5, and the regime of transition was beginning at N/d=3.0. At suppercritical Reynolds number (Re=4.52×105) the pressure distributions on two circular cylinders show the completely different features, the pressure distribution on rear cylinder may be classified into four types and the critical spacing, like that at subcritical Reynolds number is no longer existed. The more strike feature for two circular cylinders in tandem arrangements at supercritical Reynolds number is that the drag force on rear cylinder is much larger than that of front one.In general, the interference of two circular cylinders in tandem at supercritical Reynolds number are weaker than that at subcritical one.

关 键 词：串列双圆柱 高雷诺数 压力分布 绕流 湍流 实验 

分 类 号：O357.54[理学—流体力学]