造雾剂燃烧过程研究及其对凝结核生长行为的影响（英）

通过高速摄影技术拍摄造雾剂燃烧过程、利用热失重法(TG)、差示扫描量热法(DTA)、扫描电子显微镜(SEM)技术分析造雾剂的燃烧过程及其对凝结核生长行为的影响.测试结果和理论计算结果表明,造雾剂燃烧后生成携带高温凝结核的热气团,热气团上升过程中其内部温度和压力迅速下降.TG、DTA和SEM分析表明,造雾剂燃烧反应后产生的凝结核主要组分为NaCl,粒度分布范围为0.2～1μm.热气团在膨胀冷却过程中温度和压力瞬间变化而造成的巨大的过饱和度对凝结核的生长过程起到关键作用.

Combustion Process of Fog Aerosol and Its Influence on Condensation Nucleus Growth Behavior

By using of high-speed photograph techniques,thermogravimetric analysis(TC),differential thermal analysis(DTA)and scanning electron microscope(SEM),the combustion process of fog aerosol and formation of condensation nucleus were investigated.Results show that the high temperature and pressure air mass with a large amount of high temperature condensation nucleus is produced after the combustion of fog aerosol,and the temperature and pressure decrease rapidly with the air mass ascending.The particle size distribution of condensation nucleus is 0.2-1μm and its main component is NaCl.The growing process of condensation nucleus and the forming of fog droplet are related with the supersaturation produced by the cooling and expanding of the air mass.