水沙非均质流水平管道流动临界速度研究  

Experimental studies on critical velocities of sand-water heterogeneous flow in horizontal pipelines

作　　者：赵利安[1] 许振良[1] 王铁力 

机构地区：[1]辽宁工程技术大学矿业学院采矿工程系,辽宁阜新123000 [2]中煤科工集团武汉设计研究院有限公司管道输煤所,湖北武汉430064

出　　处：《水利水运工程学报》2016年第4期63-69,共7页Hydro-Science and Engineering

基　　金：中国煤炭科工集团科技创新基金资助项目(2014QN040)

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。In order to study the critical speeds of the sand-water heterogeneous flow in the pipelines, throughanalysis of a large number of previous research results, at first with the aid of the data regression, a calculationmodel for deposition critical speeds of the sand-water heterogeneous flow in pipelines is developed; at the same timeby the Durand resistance formula derivation, the calculation formula for the minimum head-loss critical speeds isput forward. Then several groups of related data from related scholars are used to verify and analyze the calculatedvalues and experimental values of deposition critical speeds and the minimum head-loss critical speeds, and thecalculated results indicate that the maximum deviation between the calculated results of the critical speeds and theminimum critical speeds and the related test results are not more than 15%. In the en d , the relationships betweenthe deposition critical speeds and the minimum head-loss critical speeds are given, and the change law of thedeposition critical speeds and the minimum head-loss critical speeds with the particle size, the diameter of thepipelines and the slurry transport concentration are also analyzed, and it is found that with the decrease of theparticle size, the gap between the deposition critical speeds and the minimum head-loss critical speeds becomessmaller gradually. As the diameter of the pipelines becomes larger, the gap between the two becomes largergradually. With the increasing of the conveying concentration, the accumulation of the boundary speeds has a slightdecrease trend, while the minimum head-loss critical speeds have a significant increase.

关 键 词：水平管道 非均质流 堆积界限速度 临界速度 

分 类 号：TV142[水利工程—水力学及河流动力学]