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人工模拟降雨的模拟方法,有强度法、中径法和能量法,其中以能量法的效果最佳。利用能量法进行人工模拟降雨,关键是准确地求出雨滴动能,而雨滴着地速度又是影响雨滴动能的主要因素。过去采用修正的沙玉清公式和牛顿公式计算人工模拟降雨的动能,除较小雨滴外,大粒径雨滴的着地速度,必须再次进行修正。经我们一再探讨,得到了大粒径雨滴着地速度的修正公式: V=4.80[D(1-e)~(-0.85H/D)]~(0.5)这个公式应用起来比过去应用的公式方便得多,而且精度相当高,与实测的大粒径雨滴的着地速度基本一致。
Artificial simulated rainfall simulation methods, there are intensity method, diameter method and energy method, of which the best energy method. The key point is to find out the kinetic energy of raindrops accurately by using the energy method. The velocity of raindrops is also the main factor that affects the kinetic energy of raindrops. In the past, the kinetic energy of artificial simulated rainfall was calculated using the modified Sapphire formula and Newton’s formula. Apart from the smaller raindrops, the ground speed of large particle raindrops must be corrected again. After repeated discussions, we get the correction formula for the velocity of large drops of rain: V = 4.80 [D (1 -e) ~ (-0.85H / D)] ~ (0.5) This formula is easier to use than the formula Much more, and the precision is quite high, which is basically the same as the ground speed of the measured large particle raindrops.