摘要
采用针管-环状电极配置的射流荷电雾化系统对水煤浆荷电射流的不稳定性进行了实验研究,通过测试荷电射流的分叉点位置、分叉射流的张角以及射流雾化滴径大小,探讨和分析了雾化操作参数和黏度特性对水煤浆荷电射流不稳定性的影响,以及荷电射流处于不同的不稳定性模式下,雾滴直径的分布规律.研究表明:通过荷电显著提高水煤浆射流的雾化质量;荷电射流表现出的不稳定模式与低黏度流体有所不同,黏度对水煤浆荷电射流的不稳定性影响显著;雾滴直径分布在锥射流和多股震荡射流模式下分别呈现单峰及双峰两种典型的分布特征.
Experimental study was performed for electro -jet instability of coal water slurry (CWS) under needle - ring electrode configuration. By testing the jet divarications, splay angle of branch jets and diameter of droplets, the influence of working parameters on electro - jet instability and distributions of droplet diameters at various instability modes were analyzed. The result shows the atomization quality of CWS electro -jet is greatly improved than nonelectro -jet; compared with the low viscous liquids, the viscosity, charging voltage and flow rate are the three considerable influential factors on highly viscous electro -jet instability; the distributions of droplet size show unimodal and bimodal characteristics at cone jet and vibrative multi - branch jet modes respectively.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2007年第4期425-428,共4页
Journal of China Coal Society
基金
福建省自然科学基金资助项目(E0410027)
福建省教育厅科研项目(JA04232)
福建省青年科技人才创新项目(2002J022)
关键词
水煤浆
荷电射流
不稳定性模式
黏度
coal water slurry
electro - jet
instability mode
viscosity