Forced convection fire spread along wooden dowel array

被引：11

作者：

Di Cristina, Giovanni ^{[1
]}

Kozhumal, Shijin ^{[2
]}

Simeoni, Albert ^{[3
]}

Skowronski, Nicholas ^{[4
]}

Rangwala, Ali ^{[3
]}

Im, Seong-kyun ^{[1
,5
]}

机构：

[1] Univ Notre Dame, Dept Aerosp & Mech Engn, Notre Dame, IN 46556 USA

[2] Eastern Kentucky Univ, Dept Fire Protect & Paramed Sci, Richmond, KY 40475 USA

[3] Worcester Polytech Inst, Dept Fire Protect Engn, Worcester, MA 01609 USA

[4] US Forest Serv, USDA, Northern Res Stn, Morgantown, WV USA

[5] Korea Univ, Dept Mech Engn, Seoul, South Korea

来源：

FIRE SAFETY JOURNAL | 2021年 / 120卷

关键词：

Flame spread; Wood combustion; Discrete fuels; Fluid dynamics; HEAT-TRANSFER; CIRCULAR-CYLINDERS; FLAME SPREAD; FLUID-FLOW; PROPAGATION;

D O I：

10.1016/j.firesaf.2020.103090

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The effects of freestream flow on fire spread behaviors of a discrete wooden fuel array were studied. The spacing between fuel elements was varied, and the flame spread behavior under 1, 2, and 3 m/s forced flow velocities was investigated. The fastest spread rate was not observed for the smallest spacing. Furthermore, increasing spacing did not necessarily lead to a slower spread, as seen with the flame spread along the 0.75 cm spaced array which was as fast or faster than the 0.5 cm spacing condition. At a spacing of 1 cm, fragmented flames were observed at wind speeds of 3 m/s that coincided with a slower spread rate than the 2 m/s wind conditions. The anomalies were explained using flame visualization and pitot probe measurements to determine the effects of flow speed at different spacing conditions. It seems that a coupling between the combustion and fluid dynamics of flow around the dowel cylinders under certain conditions strongly affects the fire spread behaviors.

引用

页数：7

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