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 ›› 2024, Vol. 43 ›› Issue (3): 304-308.

• • 上一篇    下一篇

喷射速率及障碍物对多侧受限火焰特征影响试验研究

豆鹏亮1, 黄有波2   

  1. （1. 中国建筑科学研究院有限公司建筑防火研究所, 北京 100013；2. 重庆科技大学 安全工程学院，重庆 401331）
  • 出版日期:2024-03-15 发布日期:2024-03-15
  • 作者简介:豆鹏亮（1986- ），男，甘肃庆阳人，中国建筑科学研究院有限公司建筑防火研究所高级工程师，硕士，主要从事高层建筑火灾动力学、建筑节能技术方面的研究，广西壮族自治区南宁市青秀区金湖路63号金源CBD,530028。
  • 基金资助:
    基金项目：国家自然科学基金项目(52104185)；重庆市自然科学基金项目（cstc2021jcyj-msxmX0919）；火灾科学国家重点实验室开放课题（HZ2023-KF07）

Effects of spray rate and obstacles on the characteristics of multi⁃side restricted flames

Dou Pengliang1, Huang Youbo2   

  1. (1. Institute of Building Fire Research, China Academy of Building Research, Beijing 100013, China;2. College of Safety Engineering, Chongqing University of Science and Technology, Chongqing 401331, China)
  • Online:2024-03-15 Published:2024-03-15

摘要： 为研究多侧边界限制下的水平喷射火焰形态，通过燃气喷射燃烧试验，设定喷射速率为1.04~6.25 m/s，喷射孔与障碍物的间距为0.05、0.10、 0.15、0.20 m，研究不同工况下的火焰扩散行为，并基于图像处理技术得到火焰高度，分析喷射速率和孔-板间距对受限水平喷射火特征的影响。结果表明：随喷射速率增加、孔-板间距增加，火焰高度减小；喷射速率较小且孔-板间距较大时，火焰扩散主要受浮力控制，火焰未填充整个受限空间横向区域。喷射速率较大且孔-板间距较小时，火焰撞击壁面沿撞击点上下扩散，火焰延伸高度较大。采用耦合喷射速率、孔-板间距与火源功率的无量纲参数建立无量纲火焰高度预测表达式，使其适用于三侧受限水平喷射火高度计算。

关键词: 喷射火, 受限火焰, 火焰高度, 喷射速率, 障碍物

Abstract: In order to study the horizontal jet flame morphology under multiple boundary constraints, a gas jet combustion experiment was conducted, with a jet rate of 1.04~6.25 m/s and a distance between the jet hole and the obstacle of 0.05, 0.10, 0.15, and 0.20 m. The flame diffusion behavior under different working conditions was studied, and the flame height was obtained based on image processing technology. The influence of jet rate and hole plate spacing on the characteristics of restricted horizontal jet flames was analyzed. The results show that as the injection rate increases and the hole plate spacing increases, the flame height decreases; When the injection rate is small and the hole plate spacing is large, flame diffusion is mainly controlled by buoyancy, and the flame does not fill the entire transverse area of the confined space. When the injection rate is high and the distance between holes and plates is small, the flame impacts the wall and spreads up and down along the impact point, resulting in a higher flame extension height. Establish a dimensionless prediction expression for flame height using non dimensional parameters such as coupled jet rate, hole plate spacing, and fire source power, making it suitable for calculating the height of a three side restricted horizontal jet fire.

Key words: jet fire, restricted flames, flame height, spray rate, obstacles