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清华大学学报(自然科学版)  2021, Vol. 61 Issue (6): 502-508    DOI: 10.16511/j.cnki.qhdxxb.2020.22.042
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基于形状和纹理特征的正庚烷环形油池火特性
李聪1, 马勋2, 杨锐3, 张辉3
1. 中国矿业大学 (北京) 应急管理与安全工程学院, 北京 100083;
2. 中国电子科技集团公司 信息科学研究院, 北京 100086;
3. 清华大学 工程物理系, 公共安全研究院, 北京 100084
Characterization of n-heptane annular pool fires based on flame shape and texture features
LI Cong1, MA Xun2, YANG Rui3, ZHANG Hui3
1. School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China;
2. Information Science Academy, China Electronics Technology Group Corporation, Beijing 100086, China;
3. Institute of Public Safety Research, Department of Engineering Physics, Tsinghua University, Beijing 100084, China
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摘要 该文开展了不同尺寸的环形正庚烷油池火实验。实验中改变了环形油池的内径、外径等参数,通过火焰图像的形状特征和纹理特征分析了环形火焰的结构。结果表明:环形油池火的火焰从油池外部边缘产生,向油池中心扩散。火焰内部出现空心区域,其面积随着内外径比的增大而增大。当环形油池外径不变时,火焰面积、周长、灰度共生矩阵的对比度、熵、相关度都随着内外径比的增大而逐渐减小,而能量值呈现逐渐增加的趋势。主成分分析的结果表明:前两个主成分分量与内外径比具有良好的对应关系,贡献率超过95%,可以用于定量描述环形火焰。
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李聪
马勋
杨锐
张辉
关键词 防火防爆油池火形状特征纹理特征火焰结构    
Abstract:The key characteristics of various size n-heptane annular pool fires were experimentally analyzed in this study. The experiments controlled the inner and outer diameters of the annular pool fires. The annular fire flame structures were then analyzed with measurements of the shape and texture features of the flame images. The results show that the flame generates from the outer edge of the annular pool and spreads toward the center. A hollow area develops inside the flame with this area growing as the ratio of the inner to outer diameters increases. For a constant outer diameter, the flame area, perimeter, contrast, entropy, and correlation all decrease with increasing diameter ratio, while the energy increases. A principal component analysis shows that the first two principal components related to the ratio of the inner to outer diameters have high contribution rates larger than 95%, so they can be used to quantify annular flames.
Key wordsfire and explosion protection    pool fire    shape feature    texture feature    flame structure
收稿日期: 2020-11-06      出版日期: 2021-04-28
基金资助:国家重点研发计划项目(2018YFC0809500);国家自然科学基金项目(U2033206,U1633203);中央高校基本科研业务费项目(8000150A032)
作者简介: 李聪(1991-),男,博士,讲师。E-mail:18600156862@163.com
引用本文:   
李聪, 马勋, 杨锐, 张辉. 基于形状和纹理特征的正庚烷环形油池火特性[J]. 清华大学学报(自然科学版), 2021, 61(6): 502-508.
LI Cong, MA Xun, YANG Rui, ZHANG Hui. Characterization of n-heptane annular pool fires based on flame shape and texture features. Journal of Tsinghua University(Science and Technology), 2021, 61(6): 502-508.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2020.22.042  或          http://jst.tsinghuajournals.com/CN/Y2021/V61/I6/502
  
  
  
  
  
  
  
  
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