水雾参数对环境中水蒸气体积分数影响的算法研究  

Research on correlation of water vapor content influenced by water mist parameters

作　　者：吕东[1,2] 姜楠[1] 谭蔚[2] 慕洋洋 

机构地区：[1]公安部天津消防研究所,天津300381 [2]天津大学化工学院,天津300072

出　　处：《消防科学与技术》2016年第5期598-600,共3页Fire Science and Technology

基　　金：公安部科技强警基础工作专项项目"以水雾为载体的天然气及液化石油气爆炸抑制剂研发"(2015GABJC28)

摘　　要：以吉布斯自由能为基础,根据开尔文公式研究和推导气液平衡状态下水蒸气在环境中体积分数的计算式,分析水雾粒径、水雾温度与水蒸气体积分数的关系。该计算式表明:20℃时,在常规水雾粒径(几百微米)下,粒径的变化对水蒸气的体积分数影响不大。水雾粒径大于1×10-7 m时,水雾粒径的下降对环境中水蒸气体积分数上升起的作用并不明显;水雾粒径小于1×10-7 m时,水雾粒径的下降对环境水蒸气体积分数上升起的作用显著。温度超过30℃时,水雾的温度对环境中水蒸气的体积分数影响作用比较明显。The equation for calculating the water vapor content under stage of gas-liquid equilibrium was developed based on the Gibbs free energy and Kelvin equation. The influence on water vapor content by particle size and temperature of water mist was analyzed. The equation shows that when the diameter of water mist is less than 1× 10^-7 m,the decline of the radius will show a significant impact on the water vapor content, other-wise, the affection is not obvious （particularly general water mist,about hundreds μm） at 20 ℃. And, the temperature of the water mists show a significant impact on the water vapor content when the temperature is higher than 30 ℃.

关 键 词：水雾粒径 水蒸气 表面张力 饱和蒸气压 灭火 抑爆 

分 类 号：X924.4[环境科学与工程—安全科学] TU892[建筑科学]