细颗粒泥沙絮团粒径计算新方法
发布时间：2019-03-12 14:09
【摘要】：通过分析絮团在沉降过程中所受不同性质的力与絮团形状参数之间的关系,提出了一套新的絮团粒径定义方法.以两种不同性质的泥沙为对象,使用新定义与传统的等效圆定义分别计算了泥沙絮团二维图像的粒径,并对比了两种结果的优劣.研究结果表明:与传统定义相比,新定义的计算结果更加符合实测沉速的分布规律,计算精度也有较大幅度提升;当计算形状不规则絮团的沉速时,提升幅度要明显大于平均提升幅度;与传统定义相同,当使用新定义计算絮团沉速时,小颗粒絮团的计算结果要优于大颗粒絮团.
[Abstract]:Based on the analysis of the relationship between the force of different properties and the shape parameters of the floc during the settling process, a new method for defining the particle size of the floc was put forward. Taking two kinds of sediment with different properties as the object, the two-dimensional images of sediment flocs are calculated by using the new definition and the traditional equivalent circle definition, and the advantages and disadvantages of the two results are compared. The results show that, compared with the traditional definition, the calculation results of the new definition are more consistent with the distribution law of the measured sedimentation velocity, and the calculation accuracy is also greatly improved. When the settling velocity of irregular shaped floc is calculated, the lifting amplitude is obviously larger than the average lifting amplitude, and when the new definition is used to calculate the settling velocity of floc, the calculation result of small particle flocculation is better than that of large one.
【作者单位】： 武汉大学水利水电学院;
【分类号】：TV142
本文编号：2438851
[Abstract]:Based on the analysis of the relationship between the force of different properties and the shape parameters of the floc during the settling process, a new method for defining the particle size of the floc was put forward. Taking two kinds of sediment with different properties as the object, the two-dimensional images of sediment flocs are calculated by using the new definition and the traditional equivalent circle definition, and the advantages and disadvantages of the two results are compared. The results show that, compared with the traditional definition, the calculation results of the new definition are more consistent with the distribution law of the measured sedimentation velocity, and the calculation accuracy is also greatly improved. When the settling velocity of irregular shaped floc is calculated, the lifting amplitude is obviously larger than the average lifting amplitude, and when the new definition is used to calculate the settling velocity of floc, the calculation result of small particle flocculation is better than that of large one.
【作者单位】： 武汉大学水利水电学院;
【分类号】：TV142
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