用载体流模型预测混合粒级浆体在管道中的流动

THE ESTIMATION OF POLYFRACTIONAL MIXTURE FLOW IN A PIPELINE BY MODELS WITH CARRIER FLUID

载体流模型是描述管道中液-固混合流现象的方法之一,载体流由水(或其他液体)和细颗粒组成,粗颗粒在含有悬浮细颗粒的载体中输送。本文对Weber、Richter,Vocadlo-charles、Silin、基辅水力研究院和本文作者提出的计算压降模型进行了分析。这些模型可以分为两组。在第一组中,粗、细颗粒的分界粒径是常数;在第二组中,认为分界粒径随混合流的速度而变化。最后,用尾矿、铜精矿、泥沙和煤的实验结果对这些模型的压降计算进行了比较。

The models with carrier fluid are one of ways to describe the phenomenon of liquid-solid mixture flow in a pipeline. A carrier fluid is composed of water (or other liquid) and fine particles. Coarse grain solids are transported in this carrier liquid containing suspended fine particles.In this paper the pressure drops calculated from the models of Weber, Richter, Voeadlo-Charles, silin et al., Hydromechanics Institute in Kiev and of the present author are analysed. These models can be divided into two groups. The first are the models of constant grain diameter by which the solids are divided into fine and coarse. The second are the models in which dividing diameter varies with velocity of mixture. Pressure drops calculated from the models were compared with the experimental results for flow of tailings, copper concentrate, sand and coal.