摘要
以水为雾化介质,以激光粒度分析仪为核心建立了雾化实验测试系统,对孔径分别为0.46 mm和1.44 mm的喷嘴进行了5个压力下的雾化特性实验测试,得到了两种喷嘴的索太尔平均径D(3,2)、中位径D50和体积平均径D(4,3)等表征喷嘴雾化特性的关键数据。结果表明,随着雾化压力和流量的增大,雾滴的D(3,2)、D50、D(4,3)均减小,而雾滴分布的标准差σ变大,即雾滴平均直径变小而分散度增加;雾化压力是喷嘴雾化的效果决定变量,在压力0.28 MPa下,0.46 mm孔径喷嘴雾化液滴(对应流量为8.5 L/h)的D50为73.24μm,1.44 mm孔径喷嘴雾化液滴的D50为84.94μm;同一压力下(0.28 MPa),0.46 mm孔径喷嘴的雾化效果优于1.44 mm孔径喷嘴。
With water as atomizing medium, a experimental system is built based on the laser particle analyzer, and a series of experiments were conducted for two orifice diameter 0. 46 mm and 1. 44 mm under five different pressure respectively. Sauter Mean Diameter D（3, 2） , Median Diameter D50 and Volume Mean Diameter D（4, 3） , which characterize atomization characteristic of the nozzle, are analyzed. Experimental data shows that the atomized droplets D （ 3, 2 ） , D50 , D （4, 3 ） are reduced with increase of flux of water and pressure, standard deviation σ of the distribution of droplets becomes larger; At pressure 0. 28 MPa and flow 8.5 L/h, the nozzle 0. 46 mm diameter obtains D50 = 73.24 μm of atomized droplets while 1.44 mm diameter obtains D50 = 84. 94μm ; The atomization effect of nozzle 0. 46 mm diameter is better than the 1.44 mm diameter under the 0. 28 MPa pressure.
出处
《江汉大学学报（自然科学版）》
2016年第1期5-10,共6页
Journal of Jianghan University：Natural Science Edition
关键词
雾化特性
粒度分布
压力雾化
单孔喷嘴
atomization characteristic
particle size distribution
atomization pressure
nozzle
作者简介
石零（1968-），男，教授，博士，研究方向：大气污染控制技术。
