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 (1): 13-17.

• • 上一篇    下一篇

多梯度静态低气压条件小尺度油池火燃烧特性

李 聪1 ，李彬瑞1 ，许文博1 ，杨 锐2
  

  1. 1. 中国矿业大学（北京） 应急管理与安全工程学院,北京 100083；2. 清华大学 工程物理系公共安全研究院,北京 100084

  • 出版日期:2023-01-15 发布日期:2023-01-15
  • 作者简介:李 聪（1991- ），男，安徽淮南人，中国矿业大学（北京）应急管理与安全工程学院讲师，博士，主要从事高高原火灾、火灾图像识别研究，北京市海淀区学院路丁11号，100083。
  • 基金资助:
    国网通用航空有限公司科技项目(1100/2021-44003B)；国家自然科学基金联合基金项目(U2033206)；国家重点研发计划项目(2018YFC0809500)；中央高校基本科研业务经费项目(2022YQAQ05)；贵州省科技计划项目（黔科合支撑[2021]一般 514）

Combustion characteristics of small-scale pool fire under multi-gradient static low pressures

Li Cong1 , Li Binrui1 , Xu Wenbo1 , Yang Rui2
  

  1. 1. School of Emergency Management and Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China; 2. Institute of Public Safety Research, Department of Engineering Physics, Tsinghua University, Beijing 100084, China
  • Online:2023-01-15 Published:2023-01-15

摘要：

通过实地试验和数值模拟的方法，开展了多梯度静态低压条件下小尺度油池火燃烧特性研究。分析不同火源直径和气压条件下油池火的火焰高度、火焰轴心温度等特征参量。结果表明：火焰形状随环境气压的降低呈现尖端宽度减小、炭黑颗粒增多和火焰振荡频率减弱的特征。在相同气压条件下，火焰平均高度与油池直径呈正相关性；在相同油池直径下，火焰平均高度与压力呈负相关性。拟合得到无量纲火焰高度与燃烧速率、火源直径和环境气压的定量函数关系。火焰轴心温度分为快速上升阶段和稳定阶段。油池直径一致时，火焰轴心温度峰值呈现先增加后衰减的趋势。

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Abstract:

In this paper, the combustion characteristics of small-scale oil pool fire under multi gradient static low pressure are studied by means of field experiment and numerical simulation.The characteristic parameters such as flame height and flame axis temperature of oil pool fire under different fire source diameter and pressure are analyzed. The results show that the flame shape shows the characteristics of decreasing tip width, increasing carbon black particles and weakening flame oscillation frequency with the decrease of ambient air pressure. Under the same air pressure, the average height of flame is positively correlated with the diameter of oil pool; Under the same oil pool diameter, the average flame height has a negative correlation with the pressure. The quantitative function relationship between dimensionless flame height and combustion rate, fire source diameter and ambient air pressure was obtained. The flame axis temperature can be divided into fast rising stage and stable stage.When the oil pool diameter is the same, the peak value of flame axis temperature increases first and then decreases.

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