矿浆管道输送临界流速试验研究  

Experimental study on critical velocity of slurry pipeline transportation

作　　者：许振良[1] 蔡荣宦[1] 武日权 王铁力 XU Zhenliang;CAI Ronghuan;WU Riquan;WANG Tieli(College of Mining,Liaoning Technical University, Fuxin 123000, China;Department of Pipeline Coal Transporting, Wuhan Design ＆ Research Institute Co. ,Ltd of China Coal Technology ＆ Engineering Group, Wuhan 430070, China)

机构地区：[1]辽宁工程技术大学矿业学院,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430070

出　　处：《洁净煤技术》2018年第3期139-143,共5页Clean Coal Technology

基　　金：国家自然科学基金资助项目(50874059);中国煤炭科工集团科技创新基金资助项目(2014QN040)

摘　　要：为了精确计算矿浆管道输送的临界流速,根据前人试验数据,分析了浆体浓度、管道直径、浆体粒径组成及浆体密度等对临界流速的影响,并进行机理分析。在研究前人计算临界流速公式的基础上,提出计算临界流速公式新模型及临界流速的新定义,通过量纲分析拟合出临界流速计算新公式,并对新公式进行验证。结果表明,临界流速随着浆体浓度和管径的增加而增大,随颗粒粒径和管径比值的增大而减小。本文的试验临界流速实测值与计算值最大误差为2.69%,平均误差为1.29%;文献中试验的临界流速实测值与计算值平均误差分别为4.18%、10.25%、11.45%;临界流速计算新公式平均误差均在12%以内,满足稀悬液浆体管道输送临界流速的预测要求。In order to accurately calculate the critical velocity of slurry pipeline transportation, the influence of slurry concentration, pipeline diameter, slurry size distribution and slurry density on the critical flow velocity was analyzed according to previous experimental data, and the mechanism was elucidated. The results show that with the increase of slurry concentration and pipeline diameter, the critical velocity in- creases ,while the critical velocity decreases gradually with the increasing of particle size and diameter ratio. On the basis of previous stud- ies, a new model for calculating critical velocity and a new definition on critical velocity are proposed. It is fitted by dimensional analysis and verified by experiment. The maximum error between calculated value and measured value is 2. 69% , and the average error is 1.29%. The average error of measured critical velocity and tested value from three famous scholars are 4. 18%, 10. 25% , 11.45%, respectively. The average error of the new formula to verify the calculation of critical velocity is less than 12% ,which meets the prediction of critical ve- locity.

关 键 词：矿浆管道 水力输送 临界流速 量纲分析 

分 类 号：TV142[水利工程—水力学及河流动力学]