远程喷雾降尘两相射流流场研究

(西安科技大学 能源学院,陕西 西安 710054)

矿山环境; 数值模拟; 远程喷雾降尘; 两相流

Two-phase jet flow field of remotespray dust removal
JIANG Hua,GUO Rui-ling,ZHU Jiang-tao

(College of Energy Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China)

mine environment; numerical simulation; remote spray dust removal; two-phase flow

DOI: 10.13800/j.cnki.xakjdxxb.2019.0210

备注

远程喷雾降尘是基于环保理念广泛应用于城镇除霾及矿山除尘的常见方式。为提高喷雾降尘效果,基于SOLIDWORKS与ICEM联合建立远程喷雾机几何模型,选用标准k-ε湍流模型以及DPM计算模型构造射流流场模型,利用FLUENT软件研究喷嘴出水口孔径与水流入射角对雾粒雾化浓度及射程的影响。在定水泵功率和定风机功率条件下,分别对喷嘴出水口直径为2,4,6,8和10 mm的5种工况以及水流入射角在0°,15°,30°,45°,60°和75°的6种工况进行数值模拟研究,分析两相射流流场特性,得出雾粒雾化浓度与射程变化规律。结果 表明:在定水泵功率和定风机功率,变喷嘴出水口直径和变水流入射角工况下,分别在喷嘴出口孔径为4mm和水流入射角为60°时,喷嘴雾粒分散度及密度分布比较理想且射程达到最大,雾化除尘效果较好。

Remote spray is a common way of dust removal based on the concept of environmental protection widely used in urban de-haze and mine dust removal.In order to improve the spray dust removal effect,the geometric model of remote spray was established by the union of SOLIDWORKS and ICEM,and a standard k-ε turbulence flow model and DPM calculation model were selected to construct a jet flow field of spray.The influence of the nozzle outlet diameter and the incident angle on the flow field fog particle distribution law and range was researched by the software FLUENT.Under the condition of constant pump power and fan power,numerical simulation was respectively carried out when the nozzle outlet diameter are 2,4,6,8 and 10 mm and the incident angle of water flow are 0°,15°,30°,45°,60° and 75°.The law of atomizing concentration of fog particle and range variation was obtained by analyzing the characteristics of two-phase jet flow field.The simulation results show under the working conditions of constant water pump power,constant fan power,variable nozzle outlet aperture and variable water flow incident angle,when the nozzle outlet diameter and the water flow incident angle are 4 mm and 60°,respectively,the fog particle dispersion and distribution density are relatively ideal,the range of water spraying is maximized,and the atomization dust removal has a better effect.