主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2023, Vol. 42 ›› Issue (11): 1523-1528.

• • 上一篇    下一篇

喷射压力对全氟己酮和细水雾雾化特性的影响研究

陈勇刚, 金建泉, 黄江, 贺元骅   

  1. （中国民用航空飞行学院 民航安全工程学院，四川 广汉 618307）
  • 出版日期:2023-11-15 发布日期:2023-11-15
  • 作者简介:陈勇刚（1977- ），男，四川眉山人，中国民用航空飞行学院民航安全工程学院教授，硕士，主要从事航空消防理论技术、民用飞机灭火系统研究，四川省德阳市广汉市，618307。
  • 基金资助:
    四川省科技计划项目（2021YFSY0001）；四川省重点实验室自主项目（MZ2022JB02）

Study on atomization characteristics of perfluorohexanone and water mist by injection pressure

Chen Yonggang, Jin Jianquan, Huang Jiang, He Yuanhua   

  1. (College of Civil Aviation Safety Engineering, Civil Aviation Flight University of China, Sichuan Guanghan 618307, China)
  • Online:2023-11-15 Published:2023-11-15

摘要： 为了研究哈龙替代灭火剂的雾化性能以指导消防设计，通过试验与数值模拟相结合的方式研究了细水雾和全氟己酮在不同喷射压力下的雾化特性。结果表明：由于流体自身物理特性的影响，两者雾场形态存在差异，相同工况下细水雾的雾化锥角大于全氟己酮，覆盖范围更广。在速度场方面，两者速度均随喷射压力的增加而增大，但2.5 MPa下距喷嘴100 mm处细水雾的平均速度比全氟己酮高47.3%。在粒径分布方面，同一截面处液滴粒径D32随喷射压力增加而减小，2.5 MPa下全氟己酮液滴的D32值比细水雾高39.0%。通过数值模拟进一步分析了液滴破碎过程及D32的变化趋势。因此，使用全氟己酮灭火剂时建议施加更大的喷射压力，以达到良好的雾化效果。

关键词: 细水雾, 全氟己酮, 喷射压力, 雾化特性

Abstract: In order to study the atomization performance of halon substitute extinguishing agent to guide fire control design, the atomization characteristics of water mist and perfluorohexanone under different injection pressures were studied by combining experiment and numerical simulation. The results show that there are differences in the shape of fog field between the two groups due to the physical characteristics of the fluid itself. Under the same working condition, the atomization cone angle of the fine water mist is larger than that of perfluorohexanone, and the coverage area is wider. In terms of velocity field, both velocities increased with the increase of injection pressure, but the average velocity of water mist at the distance of 100 mm from the nozzle at 2.5 MPa was 47.3% higher. In terms of particle size distribution, droplet particle size D32 at the same section decreased with the increase of injection pressure, and the D32 value of perfluorohexanone increased by 39.0% compared with that of water mist droplet at 2.5 MPa. The droplet breaking process and the variation trend of D32 were further analyzed by numerical simulation. Therefore, it is recommended to apply more injection pressure when using perfluorohexanone fire extinguishing agent in fire fighting design to achieve good atomization effect.

Key words: water mist, perfluorohexanone, injection pressure, atomization characteristic