Influence of woodgrain orientation on the upward flame spread over discrete wood chips

To have a deep understanding of influence of woodgrain orientation on the upward flame spread performance, a series of tests were conducted to obtain the profile of mass loss rate (MLR), flame spread rate (FSR), total burning duration (TBD), and the maximum flame characteristic length (MFL) by using...

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Autores principales:	Biao Zhou, Kai Wang, Wanyu Yang, Wei Wang, Biao Sun, Min Xu, Xuan Wang, Wei Ke
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Wooden structures Traditional wood Discrete fuels Air-gap Flame spread rate Woodgrain orientation Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/9274eb2af09043aab736cb254fd454ea
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spelling	oai:doaj.org-article:9274eb2af09043aab736cb254fd454ea2021-11-14T04:32:55ZInfluence of woodgrain orientation on the upward flame spread over discrete wood chips2214-157X10.1016/j.csite.2021.101616https://doaj.org/article/9274eb2af09043aab736cb254fd454ea2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2214157X21007796https://doaj.org/toc/2214-157XTo have a deep understanding of influence of woodgrain orientation on the upward flame spread performance, a series of tests were conducted to obtain the profile of mass loss rate (MLR), flame spread rate (FSR), total burning duration (TBD), and the maximum flame characteristic length (MFL) by using a traditional flame spreading measurement facility. The woodgrain orientation of samples tested in the current work are horizontal (H), vertical (V), and slanting (S). During the tests, a series of six 2 cm-long 10 cm-wide wood chips were uniformly installed on a vertical sample holder. The distance of air-gap differed from 1.0 cm to 3.0 cm and the thickness of wood chips varied from 1 mm to 4 mm. It is found that flame spread over discrete solid fuels depends on the generation rate of pyrolysis gas and direction of gas-flow, which is highly differed by the woodgrain orientation with respect to the wooden chips. The charring rate of samples imposed a strong effect on the flame spread performance. The a-MLR of three kinds of woodgrain are ranked as V > S > H. The FSR are ranked in general as H > V > S. The thickness of the samples imposed a larger effect on the TBD comparing with wood grains orientation. The TBD are ranked as S > V > H. The results of MFL indicate that as the thickness of the sample increases, MFL of samples performed with the H woodgrain is reduced greatly. However, both S and V woodgrain show a small effect on the MFL. It hopes to provide a deep understanding of flame spreading performance over wooden structures.Biao ZhouKai WangWanyu YangWei WangBiao SunMin XuXuan WangWei KeElsevierarticleWooden structuresTraditional woodDiscrete fuelsAir-gapFlame spread rateWoodgrain orientationEngineering (General). Civil engineering (General)TA1-2040ENCase Studies in Thermal Engineering, Vol 28, Iss , Pp 101616- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Wooden structures Traditional wood Discrete fuels Air-gap Flame spread rate Woodgrain orientation Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Wooden structures Traditional wood Discrete fuels Air-gap Flame spread rate Woodgrain orientation Engineering (General). Civil engineering (General) TA1-2040 Biao Zhou Kai Wang Wanyu Yang Wei Wang Biao Sun Min Xu Xuan Wang Wei Ke Influence of woodgrain orientation on the upward flame spread over discrete wood chips
description	To have a deep understanding of influence of woodgrain orientation on the upward flame spread performance, a series of tests were conducted to obtain the profile of mass loss rate (MLR), flame spread rate (FSR), total burning duration (TBD), and the maximum flame characteristic length (MFL) by using a traditional flame spreading measurement facility. The woodgrain orientation of samples tested in the current work are horizontal (H), vertical (V), and slanting (S). During the tests, a series of six 2 cm-long 10 cm-wide wood chips were uniformly installed on a vertical sample holder. The distance of air-gap differed from 1.0 cm to 3.0 cm and the thickness of wood chips varied from 1 mm to 4 mm. It is found that flame spread over discrete solid fuels depends on the generation rate of pyrolysis gas and direction of gas-flow, which is highly differed by the woodgrain orientation with respect to the wooden chips. The charring rate of samples imposed a strong effect on the flame spread performance. The a-MLR of three kinds of woodgrain are ranked as V > S > H. The FSR are ranked in general as H > V > S. The thickness of the samples imposed a larger effect on the TBD comparing with wood grains orientation. The TBD are ranked as S > V > H. The results of MFL indicate that as the thickness of the sample increases, MFL of samples performed with the H woodgrain is reduced greatly. However, both S and V woodgrain show a small effect on the MFL. It hopes to provide a deep understanding of flame spreading performance over wooden structures.
format	article
author	Biao Zhou Kai Wang Wanyu Yang Wei Wang Biao Sun Min Xu Xuan Wang Wei Ke
author_facet	Biao Zhou Kai Wang Wanyu Yang Wei Wang Biao Sun Min Xu Xuan Wang Wei Ke
author_sort	Biao Zhou
title	Influence of woodgrain orientation on the upward flame spread over discrete wood chips
title_short	Influence of woodgrain orientation on the upward flame spread over discrete wood chips
title_full	Influence of woodgrain orientation on the upward flame spread over discrete wood chips
title_fullStr	Influence of woodgrain orientation on the upward flame spread over discrete wood chips
title_full_unstemmed	Influence of woodgrain orientation on the upward flame spread over discrete wood chips
title_sort	influence of woodgrain orientation on the upward flame spread over discrete wood chips
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/9274eb2af09043aab736cb254fd454ea
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Influence of woodgrain orientation on the upward flame spread over discrete wood chips

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