泡沫-细水雾雾场特性的试验研究  

On the experimental and numerical simulation of the atomization specific features of the fine water mists

作　　者：陈晟 蔚超 许建刚 郭王勇 罗剑飞 陈鹏[3] 杨帅锋 李立杨 CHEN Sheng;WEI Chao;XU Jian-gang;GUO Wang-yong;LUO Jian-fei;CHEN Peng;YANG Shuai-feng;LI Li-yang(State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 210024,China;State Grid Electric Power Research Institute Co.,Ltd.,Nanjing 211106,China;School of Emergency Management and Safety Engineering,China University of Mining&Technology Beijing,Beijing 100086,China)

机构地区：[1]国网江苏省电力有限公司,南京210024 [2]国网电力科学研究院有限公司,南京211106 [3]中国矿业大学(北京)应急管理与安全工程学院,北京100086

出　　处：《安全与环境学报》2021年第3期1048-1053,共6页Journal of Safety and Environment

基　　金：国家电网公司科技项目(8000-201918445A-0-0-00)。

摘　　要：为了研究泡沫-细水雾与细水雾雾场特性的差异,建立了泡沫-细水雾和细水雾雾场测定系统。利用高速摄像技术、激光器偏光技术、激光粒度分析技术分别对中压工况下的泡沫-细水雾和细水雾雾场参数进行了试验研究。结果表明,雾场形态均保持标准的圆锥状,细水雾和泡沫-细水雾雾场边缘雾化效果较好,雾化效果向中心逐渐变差。系统工作压力对泡沫-细水雾的雾化锥角影响较大,工作压力为1.0MPa时雾化锥角为51°,工作压力为3.5 MPa时增大到80°。不同压力下细水雾的雾化锥角变化较小,约为80°。泡沫-细水雾锥体中心处的雾流密度与系统工作压力成反比,压力越高,雾场的保护半径越大,雾滴分布越均匀。1.0 MPa、1.5MPa、2.0 MPa、2.5 MPa压力下泡沫-细水雾锥体中心处的雾流密度均大于细水雾锥体中心处的雾流密度。泡沫-细水雾雾滴粒径分布呈现随距喷头垂直距离增大而增大的总体特征,由于泡沫-细水雾雾滴的发泡作用,泡沫-细水雾雾场的雾滴粒径在喷头正下方10~100 cm处均大于细水雾雾场的雾滴粒径。The present paper is aimed to establish a fine-foaming water mist and the fine water mist field determination system to examine and determine the relation and the different features between the foam-fine water mist and the fine water mist field.For such a purpose,we think it necessary to test the parameters of the foam-fine water mists and the fine water mist field under the medium pressure conditions through the high-speed camera technology,laser polarizing technology and the laser particle size analysis technology.The results of the mentioned testing practice of ours indicate that the fog field pattern sizzled in the standard conical shape,the fine water mist and the foam-fine water mist field edge atomization effect proves useful,with the atomization effect getting to be gradually deteriorated towards the center of the mist.Besides,the working pressure of the system can be potential with a great influence on the atomized conic angle of the said foam-fine water mist.And,when the atomized cone angle comes up to 51 degrees at the working pressure of 1.0 MPa at the working pressure of 3.5 MPa,the atomized conic angle of the fine water mist may begin to vary at the different pressures about 80 degrees.At the same time,the density of the fog flow at the central part of the foam-fine water mist cone can also be expected to keep at about the experimental and numerical simulation of the atomization features of the fine water.Besides,the working pressure of the system may still have a great impact on the atomized cone angle of the foam-fine water mist simultaneously,with the atomized cone angle being at 51 degrees at the working pressure of 1.0 MPa and the working pressure being 3.5 MPa.At the same time,the atomized conic angle of the fine water mist at the different pressures tends to vary less,merely about 80 degrees.And,then,the density of the fog flow at the center of the foamfine water mist cone may also tend to be inversely proportional to the working pressure of the system,with the result being:the higher the pre

关 键 词：安全工程 细水雾 泡沫-细水雾 雾化锥角 雾流密度 

分 类 号：X93[环境科学与工程—安全科学]