摘要
本文通过对雨滴降落过程中力学规律的分析,从理论上导出了雨滴降落任一高度时的速度计算公式,并进而导出了雨滴终速公式.本文提出了雨滴变形系数的概念,用于描述直径大于3.0mm的雨滴在降落过程中形状因子对其落速的影响.经收集到的前人试验资料的验证,所得公式计算精确度高,且公式形式简单,可用于确定降雨动能和设计人工模拟降雨装置等生产实践方面.
Based on the mechanical analysis, the calculation formula of falling rain drop velocity for any altitude is dedueed theoredically, therefore the terminal velocity is obtained. In order to consider the effect of shape.factor on the fall velocity of drops with a diameter larger than 30mm, the deformation coefficient is introduced. The formula is verified with the data obtained by the authors and other researchers. The calculated results are in good agreement with measured data. The formula can be used to determine the kinematic energy of rain fall and it can also be used in the design of rain fall simulators.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
1993年第3期21-27,共7页
Journal of Hohai University(Natural Sciences)
关键词
雨滴终速
变形系数
降落
速度
terminal velocity of rain drop
viscosity resistance
turbulence resistance
deformation coefficient
