螺旋扭曲扁管料浆输送流阻特性  

The Flow Resistance Characteristics of Slurry Transportation in Twisted Oblate Pipe

作　　者：杨超[1,2] 吕文生[1,2] 杨鹏[1,2,3] YANG Chao LV Wensheng SANG Peng(School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China Key Laboratory of the Ministry of Education of High-efficient Mining and Safety of Metal Mines, Beijing 100083, China Beijing Key Laboratory of Information Service Engineering, Beijing 100101, China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]金属矿山高效开采与安全教育部重点实验室,北京100083 [3]北京市信息服务工程重点实验室,北京100101

出　　处：《矿业研究与开发》2017年第3期33-38,共6页Mining Research and Development

基　　金："十二五"国家科技支撑计划项目(2012BAB08B01)

摘　　要：为解决小倍线充填中的剩余压头过大问题,基于工程流体力学、料浆自流输送模型等理论,提出了利用螺旋扭曲扁管来消耗深井充填管道输送系统剩余压头的方案。当料浆流速为2m/s时,螺旋扭曲扁管横截面上的纵向涡量值比圆管高出了2个数量级,由此造成的垂直于主流方向的纵向旋转分速度和二次旋流是螺旋扭曲扁管增阻的主要原因;螺旋扭曲扁管的扭曲程度越大,随料浆流速和黏性系数的增加,充填料浆的沿程阻力损失增大的速度越快,增阻效果越好;当螺距S≤1.0 m或者横截面长短轴之比A/B≥1.60时,螺旋扭曲扁管具有较好的增阻效果。In order to solve the problem of large residual pressure head in the backfill with low filling gradient, and based on several theories, such as engineering fluid mechanics and slurry gravity conveying model, the scheme that used twisted oblate pipe to consume the residual pressure head of deep-well filling pipeline transportation systems was put forward. When the slurry flow rate was 2 m/s, the longitudinal vorticity in the cross section of twisted oblate pipe was higher by two orders of magnitude than that of circular pipe. As a result, the longitudinal rotation speed across the main flow and the secondary swirl flow were the main reasons of the increasing resistance of twisted oblate pipe. With the increasing of slurry flow rate and viscosity coefficient, the greater twist degree of twisted oblate pipe was, the greater the increasing of on-way resistance loss of filling slurry was, and the better the increasing resistance effect was. When the pitch of screws S was tess than or equal to 1.0 m or the axis ratio at cross section A/B was equal to or greater than 1.60, the twisted oblate pipe had a good effect on increasing resistance.

关 键 词：充填 料浆输送 螺旋扭曲扁管 沿程阻力损失 计算流体力学 

分 类 号：TD853.34[矿业工程—金属矿开采]