细水雾作用下烟颗粒形貌及尺寸变化规律研究  

Study on variational principles of smoke particle shape and dimension with water mist appling

作　　者：房玉东[1] 

机构地区：[1]国家安全生产监督管理总局通信信息中心,北京100013

出　　处：《中国工程科学》2014年第2期93-100,共8页Strategic Study of CAE

基　　金：国家自然科学基金青年科学基金项目(50904041);中国博士后科学基金面上项目(20070410067)

摘　　要：利用Sirion200型场发射扫描电子显微镜拍摄细水雾作用前后柴油和聚氯乙烯(PVC)材料烟颗粒的形貌和内部结构图像。定义了烟颗粒的采样平均直径(dA)和表面密度(ρS),利用统计分析的方法计算了细水雾作用前后烟颗粒的dA和ρS,研究了采样点空间位置、细水雾工作压力、雾滴粒径和雾滴速度等因素对dA和ρS的影响规律,揭示了细水雾冲刷火灾烟颗粒的主导机理,为细水雾技术用于计算机房等电气环境的火灾烟气抑制提供了科学的参考依据。The micrographs of diesel oil soot particles were achieved by transmission sca-nning electron microscope with and without water mist applied. It was seen by statistical analy-sis that the average diameter of soot particle increased and the surface density of soot particle de-creased with water mist applied. The experimental results show that water mist washes out smoke mainly by dynamics effect,cloud physics effect and transportation mechanism of Ste-ffen flow. This paper provides scientific references for water mist technology using in smoke scrubbing of computer room fires.

关 键 词：细水雾 烟颗粒 表面密度 采样平均直径 

分 类 号：X93[环境科学与工程—安全科学]