煤炭工程 ›› 2013, Vol. 45 ›› Issue (s1): 132-134.doi: 10.11799/ce201308098

• 研究探讨 • 上一篇    下一篇

水煤浆管道输送流动性的数值模拟

柳富明   

  1. 中煤科工集团武汉设计研究院
  • 收稿日期:2013-05-23 修回日期:2013-05-30 出版日期:2013-08-12 发布日期:2013-08-12
  • 通讯作者: 柳富明 E-mail:lfm0929@163.com

Numerical simulation of pipeline transportation of coal slurry flow base on CFD

  • Received:2013-05-23 Revised:2013-05-30 Online:2013-08-12 Published:2013-08-12

摘要:

为了研究水煤浆在不同管道中的流动特性,应用计算流体力学软件(CFD)中的欧拉模型对水煤浆在水平管、弯管中的流动进行数值模拟。模拟分析了水煤浆以一定速度、一定体积浓度以及四种粒径工况下分别流过水平管道、90°弯管和150°弯管后水煤浆中煤颗粒的体积分数沿管道截面的分布状况。结果表明:当水煤浆的流速为1.7m/s、体积浓度为45%以及煤粉粒径为0.5mm时,在水平管道和弯管中都出现明显的相分离现象,但粒径小于0.25mm后在水平管及弯管中的颗粒基本没有分离现象,能很好的满足管道输煤的理论要求;且对于同一粒径的浆体,在直管中的流动性会更好。

关键词: 水煤浆, 体积分数, 数值模拟, 管道

Abstract:

In order to study coal slurry flow characteristics in different channels, the application of the Euler Model of computational fluid dynamics (CFD) software carries on the numerical simulation for coal-water slurry flow in horizontal pipe and flexural pipe. It simulation analysis that, the coal water slurry at a stated speed, at a stated volume fraction as well as four kinds of coal grain diameter, the volume fraction distribution along the pipe section of the coal grain by respectively through the horizontal pipe, 90 ° and 150 °flexural pipe. The results show that, when the velocity of flow of coal slurry is 1.7m/s , the volume fraction is 45% and coal grain diameter is 0.5mm, in the horizontal pipe and flexural all appear obvious phase separation phenomenon, but when the coal grain diameter less than 0.25mm, in a horizontal pipe and flexural without appear phase separation phenomenon ultimately, it can completely satisfy the academic request of the coal transportation by pipe; for the same grain diameter of slurry, the fluidity in the straight pipe will be better.

Key words: Coal slurry, Volume fraction, the numerical simulation, pipe