CAJ | 학술논문

从理论上分析了雾滴粒径与初速度对水平运动的影响,得到了不同粒径与初速度时的雾滴在水平方向上能达到的极限距离,分析了雾滴在水平穿越火焰区时蒸发量与火焰厚度以及雾滴速度之间的关系.从理论上分析了水雾水平作用于火焰与垂直作用于火焰的区别,提出了当水雾抑制竖直壁面火蔓延时,其灭火机理以表面相灭火为主,采用较小的雾滴粒径并不能达到更好的灭火效果.在标准燃烧室内开展了全尺寸实验,对理论分析结果进行了验证.
종이론상분석료무적립경여초속도대수평운동적영향,득도료불동립경여초속도시적무적재수평방향상능체도적겁한거리,분석료무적재수평천월화염구시증발량여화염후도이급무적속도지간적관계.종이론상분석료수무수평작용우화염여수직작용우화염적구별,제출료당수무억제수직벽면화만연시,기멸화궤리이표면상멸화위주,채용교소적무적립경병불능체도경호적멸화효과.재표준연소실내개전료전척촌실험,대이론분석결과진행료험증.
Water droplet cannot reach the wall unless it has enough muzzle velocity when it reaches the front of flame plane because of flow resistance in fire zone. Motion of water droplet varying in droplet size and original velocitiy is discussed and extreme length of droplet is gained. Relationships between droplet size and time and distance when water droplet passes through flame zone are analyzed. Considering different droplet sizes and velocities,fire suppression mechanisms can be divided into surface and gaseous suppression. The different between vertical and horizontal water spray is analyzed theoretically.It is found that when water is sprayed horizontally to lining material,surface suppression plays the major part. Then full-scale fire tests were conducted in the ISO 9705 room,whose results validated the theorical analysis.