Experimental Study on Solid Particle Movement in Micro-channel Using Particle Image Velocimetry

YU Li-ming; XIA Xiao-long; JIANG Chang-bo; CHEN Shao-wen; HUANG Liang-cai; ZHAO Li-ping

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Experimental Study on Solid Particle Movement in Micro-channel Using Particle Image Velocimetry

- Experimental Study on Solid Particle Movement in Micro-channel Using Particle Image Velocimetry
- Bulletin of Soiland Water Conservation Vol. 31, Issue 6, Pages: 168-171(2012)
- 作者机构：
  
  1. 长沙理工大学水利工程学院
  2. 广东金东海集团有限公司
- 作者简介：
- 基金信息：
- DOI：
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- Published：2012
- 稿件说明：
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YU Li-ming, XIA Xiao-long, JIANG Chang-bo, et al. Experimental Study on Solid Particle Movement in Micro-channel Using Particle Image Velocimetry[J]. Bulletin of Soiland Water Conservation, 2012, 31(6): 168-171.
DOI：

YU Li-ming, XIA Xiao-long, JIANG Chang-bo, et al. Experimental Study on Solid Particle Movement in Micro-channel Using Particle Image Velocimetry[J]. Bulletin of Soiland Water Conservation, 2012, 31(6): 168-171. DOI：

摘要

为了解迷宫流道内固体颗粒的运动规律

提高灌水器的抗堵塞能力

采用粒子图像测速仪(particle image velocimetry

PIV)对不同直径和不同密度的固体颗粒在迷宫流道内的运动规律进行了实验观测。结果表明

根据颗粒的运动轨迹线可知齿形流道内水流在各齿尖做类似于正弦波的运动

靠近齿尖处形成主流区

靠近齿底处形成漩涡区;直径小(65mm)或密度低(1 740kg/m3)的颗粒跟随性比较好

颗粒直径或密度越大

运动越紊乱

出现的最小极值速度越低

越容易进入漩涡区并最终可能导致堵塞;与固体颗粒直径相比

颗粒密度对运动轨迹、路程和速度的影响较小。

Abstract

To understand the movement of solid particles in micro-channel and improve the anti-clogging ability of emitters

we observed the movement of solid particles of different diameters and the different densities in labyrinth channel using particle image velocimetry(PIV).The trajectories of solid particles showed that water in zigzagging channel flew in sine wave

and formed mainstreams near the tips of the spikes and turbulence at the bottoms.Particles of small diameter(65 mm) or low density(1 740 kg/m3) exhibited apparent following behaviors.With the increase of the diameter or density

water flew more turbulently

particles moves slower and became more easily to be trapped and caused clogging.Comparing to the diameter

the density of the particles affected less their movement trajectories

path lengths and velocities.

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