摘要：对球形颗粒曳力系数关联式进行了分析比较，发现国内外一些教科书和文献中常用的过渡区的两个关联式误差很大．不宜推荐继续使用，但在工程设计计算中可使用优选出的形式比较简单、计算结果比较准确的关联式本文还提出一种计算球形颗粒自由沉降速度的新方法，用Rep－Ar表或Rep－Ar关联式可直接计算出球形颗粒的自由沉降速度，避免了试差或迭代．

关键词：球形颗粒;曳力系数;沉降速度;

Abstract：The available correlations for the drag coefficient of a spherodial particle moving ina fluid are reviewed and some simple and accurate formulas are proposed.New methods and equations are suggested for the calculation of settling velocity of a sphero.dial particle. The equations for calculating settling velocity are simple to use and enable solutions tobe obtained for practical problems without using iterative procedures.

Key words：spherodial particle; drag coefficient; settling velocity