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 (6): 762-767.

• • 上一篇    下一篇

环形油池火燃烧火羽流火焰温度及高度模拟研究

方伟, 张少刚, 刘家豪, 汪金辉   

  1. （上海海事大学 海洋科学与工程学院，上海 201306）
  • 出版日期:2023-06-15 发布日期:2023-06-15
  • 作者简介:作者简介：方 伟（1998— ），男，安徽桐城人，上海海事大学海洋科学与工程学院硕士研究生，主要从事环形油池火数值模拟研究，上海市浦东新区临港大道1550号，201306。
  • 基金资助:
    国家自然科学基金青年基金（51909152）

Simulation on temperature and flame height of fire plume of annular pool fire

Fang Wei, Zhang Shaogang, Liu Jiahao, Wang Jinhui   

  1. (School of Marine Science and Engineering, Shanghai Maritime University, Shanghai 201306, China)
  • Online:2023-06-15 Published:2023-06-15

摘要： 采用FDS数值模拟方法，对火焰融合和火焰未融合两种状态下的环形油池火燃烧火羽流温度及火焰高度进行研究。结果表明：火羽流中心线最高温升的变化趋势与火焰状态密切相关。引入环径比δ，定义了新的无量纲火焰高度H^* 。δ相同时，H^*随火源热释放速率的增大而增大；火源热释放速率相同且火焰发生融合时，H^*随δ的增大呈现上升趋势；火源热释放速率相同且火焰未融合时，H^*随δ的增大呈现下降趋势。并在火焰融合和未融合两种状态下提出了火焰高度表征模型。

关键词: 环形油池火, 火焰融合, 火焰温度, 火焰高度, 数值模拟

Abstract: In this paper, FDS is used to study the temperature and flame height of annular pool fire under flame fusion and non-fusion. The results show that the variation trend of the maximum temperature rise of the plume is closely related to the flame state. Introduced the ratio of internal radius to external radius δ,and a new dimensionless flame height H^* is defined. With the same δ, H^* increases with the increase of heat release rate. When the heat release rate of fire source is the same and the flame is fused, H^* shows an upward trend with the increase of δ, and the greater the heat release rate of fire source is, the more obvious the upward trend is. When the fire heat release rate is the same and the flame is not fused, the H^* decreases with the increase of δ. And the empirical characterization models of flame height were proposed under the flame fusion and non-fusion.

Key words: annular pool fire, flame fusion, flame temperature, flame height, numerical simulation