Effect of Wind on Fire Whirl Over a Line Fire

被引:24
作者
Zhou, Kuibin [1 ,2 ]
Zhou, Kuibin [1 ,2 ]
Liu, Naian [2 ]
Yuan, Xieshang [2 ]
机构
[1] Nanjing Tech Univ, Coll Safety Sci & Engn, Jiangsu Key Lab Urban & Ind Safety, Nanjing 210009, Jiangsu, Peoples R China
[2] Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China
基金
对外科技合作项目(国际科技项目); 中国国家自然科学基金;
关键词
Fire whirl; Wind speed; Line fire; Occurrence frequency; Scaling analysis; MODEL;
D O I
10.1007/s10694-015-0507-9
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Fire whirls are often reported to occur in wildland and urban fires due to the effect of ambient wind. This paper presents an experimental study on the fire whirls over a line fire with cross wind, focusing on the occurrence frequency of fire whirls. The experimental observations indicated that the fire whirls induced by a line fire may spread beyond the line fire region with the effect of wind. For the effect of cross wind, it is indicated that the cross wind basically increases the occurrence frequency, while the velocity components parallel or perpendicular to the line fire have competitive effects. A scaling law is presented for the critical wind speed inducing fire whirls based on the experimental data in this work and literature. A method is proposed to estimate the magnitude of the fire whirl height under the critical wind speed.
引用
收藏
页码:865 / 875
页数:11
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