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水力输送沉降性固体颗粒时,要使颗粒以悬浮状态输送,所需水力动力较大。一般来说,输送速度是在小于临介悬浮速度范围内选定。因此,大部分颗粒集中在管内下部流动,这就将出现堆积层或滑动层流态。由于这种流态对颗粒的附加压头损失很大,因此,导致管道堵塞的危险性也大。所以,为了避免水力输送沉降性颗粒发生这些危险性,确保输送,作者已在第1报文章中,介绍过管内颗粒群的动态实验和理论研究情况。颗粒主要是以跳跃形
When hydraulically transporting settled solid particles, the particles need to be transported in a suspended state, requiring a large hydraulic power. In general, the conveying speed is selected within the range of the speed of the medium suspension. Therefore, most of the particles are concentrated in the lower part of the tube. This will result in a buildup or sliding layer flow regime. Because of the large loss of the additional pressure head to the particles, the risk of blockage of the pipeline is also great. Therefore, in order to avoid the occurrence of these dangers in the hydraulic transport of settled particles and to ensure the transport, the author has introduced the dynamic experimental and theoretical research of the particle clusters in the first article. Particles are mainly jump-shaped