【摘要】 冰雹下落末速度是冰雹物理学的一个重要的运动学参数。我国新疆地区降雹中以圆锥形雹块最多,但对圆锥形冰雹自由下落末速度的研究却不多见。本文用实验方法测量了圆锥形雹块模型的下落末速度,并推导了用几何特征量表示的圆锥形冰雹下落末速度公式。实验和理论研究结果表明,圆锥形冰雹下落末速度与圆球形冰雹不同,它不是冰雹质量或大小的单一函数,而是其质量和形状参量(如锥角、底面曲率等)的函数。更多还原

【Abstract】 The terminal velocity of free-falling hailstones of conical shape, which are often found in Xinjiang region of China, has not been much inves tigated. Our experiment measures this velocity of conical hailstone models. An equation expressing this velocity with respect to the geometricparameters is derived. Both experiment and theoretical inference showthat the terminal velocity of the conical hailstones differs from that ofthe spherical ones. The former is not a simple function of mass andsize but a function of mass and geometric parameters such as the conicalangle and the curvature of the base of the cone.更多还原