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J. Hefei Univ. Tech. (Nat. Sci.)

合肥工业大学学报(自然科学版)

JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY (NATURAL SCIENCE)

Competent Authorities: Ministry of Education of the People's Republic of China

Sponsor by: Hefei University of Technology

ISSN 1000-1646, CN 34-1001/N

Experimental study on the effect of slope on the spread of mountain fire

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坡度对山地火蔓延影响的实验研究

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Oct.2023, Vol.46 No.10: 1401-1408

DOI: 10.3969/j.issn.1003-5060.2023.10.016

Authors

ZHAO Yanqiu, WANG Changjian, ZHANG Xu, WU Yue, YU Xing

(School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China)

Abstract and Keywords

Abstract: Fire spread experiments were carried out on mountain models with slopes ranging from $ 0^{\circ} $ to $ 40^{\circ} $. The effects of different central slopes and lateral slopes on flame line profile, flame line angle, flame length and the rate of fire spread (ROS) are studied, and the preheating mechanism of the fuel in the unburned area in front of flame was analyzed. It is found that ridge fire forms a water-droplet-shaped flame line, and valley flame line are V-shaped on lateral slopes. The central slope and lateral slope will have an important impact on the spread behavior of mountain fire. With the increase of the central slope, the convection heat transfer of the valley flame is significantly enhanced, and the ROS increases rapidly.

Keywords: mountain fire; central slope; lateral slope; rate of fire spread(ROS); preheating stage

作者信息

赵艳秋，王昌建，张旭，吴越，於星

（合肥工业大学土木与水利工程学院，安徽合肥230009）

摘要和关键词

摘要: 文章在坡度为 $ 0^{\circ}\sim40^{\circ} $的山地模型上开展火蔓延实验，研究不同的中心坡度和侧面坡度对火线轮廓、火线夹角、火焰长度和火蔓延速率（rate of fire spread，ROS）的影响，分析火焰对前方未燃烧的燃料的预热作用。研究发现：山脊火会形成水滴状火线，山谷火线在侧坡上呈V形；中心坡度和侧面坡度会对山地火蔓延行为产生重要影响，随着中心坡度增加，山谷火焰对流换热明显增强，ROS快速增加。

关键词: 山地火；中心坡度；侧面坡度；火蔓延速率(ROS)；预热阶段

Funding

安徽省重点研发计划资助项目（S202104b11020035）

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