| 摘要: |
| 为研究水沙非均质流管道流动的临界速度，在分析前人非均质流管道输沙试验研究成果的基础上，利用数据回归方法建立水沙非均质流管道流动的堆积界限速度计算模型，同时通过分析费祥俊阻力公式，采用求导方式，给出了水沙浆体阻力最小临界速度计算式。然后利用相关学者的若干组数据，对所提出堆积界限速度和阻力最小临界速度的计算值和试验值进行对比。结果表明，作者提出的堆积界限速度和阻力最小临界速度的预测值与实测值的偏差大都不超过15%。最后分析了堆积界限速度和阻力最小临界速度随颗粒粒径、管道直径和浆体输送浓度变化的规律，得出随着颗粒粒径减小，两者差距逐渐变小；随着管道直径变大，两者差距逐渐变大；随着输送浓度变大，堆积界限速度呈略微变小的趋势，而阻力最小临界速度则呈显著增大的趋势。 |
| 关键词: 水平管道 非均质流 堆积界限速度 临界速度 |
| DOI： |
| 分类号:TV142 |
| 基金项目:中国煤炭科工集团科技创新基金资助项目（2014QN040） |
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| Experimental studies on critical velocities of sand water heterogeneous flow in horizontal pipelines |
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ZHAO Li-an1, XU Zhen-liang1, WANG Tie-li2
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1.Department of Mining Engineering, Mining Institute, Liaoning Technical University, Fuxin;2.Department of Pipeline Coal Transporting, Wuhan Design and Research Institute Co., Ltd., China Coal Technology and Engineering Group, Wuhan
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| Abstract: |
| In order to study the critical speeds of the sand-water heterogeneous flow in the pipelines, through analysis of a large number of previous research results，at first with the aid of the data regression, a calculation model for deposition critical speeds of the sand-water heterogeneous flow in pipelines is developed; at the same time by the Durand resistance formula derivation, the calculation formula for the minimum head-loss critical speeds is put forward. Then several groups of related data from related scholars are used to verify and analyze the calculated values and experimental values of deposition critical speeds and the minimum head-loss critical speeds, and the calculated results indicate that the maximum deviation between the calculated results of the critical speeds and the minimum critical speeds and the related test results are not more than 15%. In the end, the relationships between the deposition critical speeds and the minimum head-loss critical speeds are given, and the change law of the deposition critical speeds and the minimum head-loss critical speeds with the particle size, the diameter of the pipelines and the slurry transport concentration are also analyzed, and it is found that with the decrease of the particle size, the gap between the deposition critical speeds and the minimum head-loss critical speeds becomes smaller gradually. As the diameter of the pipelines becomes larger, the gap between the two becomes larger gradually. With the increasing of the conveying concentration, the accumulation of the boundary speeds has a slight decrease trend, while the minimum head-loss critical speeds have a significant increase. |
| Key words: horizontal pipeline heterogeneous flow deposition critical speed critical speed |
