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高雷诺数时弹性圆柱的波流载荷

HYDRODYNAMIC FORCES ACTING ON AN ELASTIC CIRCULAR CYLINDERIN COMBINED WAVE AND CURRENT FLOW AT HIGH REYNOLDS NUMBERS

  • 摘要: 在0.61×10 ̄5Re6.01×10 ̄5,0.93H/D2.50(H为波高,D为圆柱直径)的范围内实验研究了弹性圆柱在浪流联合作用下的流体载荷。通过测量柱表面压力,得到了脉动升力和阻力系数,并给出了Morison公式中的C_D,C_M值随Kc数的变化关系,实验结果表明:在浪流联合作用下的圆柱体,其流体载荷与雷诺数的变化密切相关,并且圆柱的振动对流体载荷也有影响。

     

    Abstract: In this paper, wave forces acting on a submerged circular cylinder movingforward with a constant velocity in regular waves are investigated experimentally. TheReynolds numbers and the Keulegan──Carpenter numbers are in the range: 0.61 × 10 ̄5Re6.01 × 10 ̄5,4.61 Kc74.80,The surface pressures of the cylinder and the cylinder’svibrations caused by the hydrodynamic forces are measured,from which the drag and inertiacoefficients(C_D, C_M)in Morison’s formular are analyized, the fiuctuating drag and liftcoefficien...

     

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