Characterization of n-heptane annular pool fires based on flame shape and texture features

被引：0

作者：

Li C. ^{[1
]}

Ma X. ^{[2
]}

Yang R. ^{[3
]}

Zhang H. ^{[3
]}

机构：

[1] School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), Beijing

[2] Information Science Academy, China Electronics Technology Group Corporation, Beijing

[3] Institute of Public Safety Research, Department of Engineering Physics, Tsinghua University, Beijing

来源：

Qinghua Daxue Xuebao/Journal of Tsinghua University | 2021年 / 61卷 / 06期

关键词：

Fire and explosion protection; Flame structure; Pool fire; Shape feature; Texture feature;

D O I：

10.16511/j.cnki.qhdxxb.2020.22.042

中图分类号：

学科分类号：

摘要：

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. © 2021, Tsinghua University Press. All right reserved.

引用

页码：502 / 508

页数：6

共 24 条

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