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| 粗颗粒物料在垂直管流中的滞留效应 | |
| 引用本文： | 夏建新,倪晋仁,黄家桢.粗颗粒物料在垂直管流中的滞留效应[J].矿冶工程,2002,22(3):37-40. |
| 作者姓名： | 夏建新 倪晋仁 黄家桢 |
| 作者单位： | 1. 长沙矿冶研究院,海底矿产资源开发研究所,湖南,长沙,410012;北京大学环境科学中心,水沙科学教育部重点实验室,北京,100871 2. 北京大学环境科学中心,水沙科学教育部重点实验室,北京,100871 3. 长沙矿冶研究院,海底矿产资源开发研究所,湖南,长沙,410012 |
| 摘 要： | 颗粒滞留效应，将导致在垂直管流中物料的当地浓度大于输送浓度。采用快速摄影技术测量了粗颗粒在垂直管流中的滑移速度，并利用流态化试验探讨了不规则形状颗粒的拖曳力系数以及颗粒群在上升流中滑移速度的变化规律。结合理论分析给出了当地浓度的估算公式，并得到了实验数据的验证。 |
| 关 键 词： | 粗颗粒物料 固液两相液 垂直管道 滞留效应 滑移速度 |
| 修稿时间： | 2002年3月17日 |
Lagging Effect of Coarse Materials in Vertical Pipe Flow |
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| XIA Jian xin ,NI Jin ren ,HUANG Jia zhen.Lagging Effect of Coarse Materials in Vertical Pipe Flow[J].Mining and Metallurgical Engineering,2002,22(3):37-40. | |
| Authors: | XIA Jian xin NI Jin ren HUANG Jia zhen |
| Affiliation: | XIA Jian xin 1,2,NI Jin ren 2,HUANG Jia zhen 1 |
| Abstract: | In a vertical pipe, actual concentration of materials under delivery is greater than the one at its outlet due to lagging effect. The slip velocities of coarse particles in the vertical pipe flow have been measured by using high speed photography, and the drag force of irregular shape particles and the changes in slip velocity of particles groups in the upward flow have been investigated by the experiments of fluidized bed, with reference to theoretical analysis, the authors give a formula for estimating the actual concentration of material under delivery. The formula has been verified by the measured results. |
| Keywords: | solid liquid two phase flow vertical pipe lagging effect slip velocity |
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