泥沙颗粒团沉速

Settling Velocity of Sediment Particle Clouds

摘要:

针对现有的泥沙沉速公式大多适用于单颗粒泥沙沉降的情形，基于前人对单颗粒泥沙沉速规律的研究成果，利用试验测得不同泥沙颗粒团在水中沉降时的沉速数据，引入泥沙颗粒团特征粒径及附加粒径2个因子，对多个广泛运用的单颗粒泥沙沉速公式进行了修正.用修正后的公式计算得到的泥沙颗粒团沉速与用试验测得的泥沙颗粒团沉速较接近,可推广运用到计算泥沙颗粒团在水中的沉降速率.

Abstract:

The most of previous sediment settling velocity formulas were suitable for single sediment particle. Based on the previous research results on single sediment particle settling velocity laws and the experimental data of sediment particle cloud during the settlement process in water body, the formulas for calculating the settling velocity of sediment particle cloud were proposed by introducing two factors, i.e., the characteristic particle size of sediment particle cloud and additional particle size, to correct the existing single sediment particle settling velocity formulas. The settling velocity values of sediment particle cloud calculated by the corrected formulas were very close to the experimentally measured settling velocity values of sediment particle cloud, which indicates the corrected formula can be applied to calculate the settling velocity of sediment particle clouds.