Experimental study on upward flame spread characteristics of external thermal insulation material under the influence of porosity
Upward flame spread characteristics over extruded polystyrene (XPS) foams with different porosities has been analyzed through experiments. In this paper, the average flame height and average maximum flame temperature first rise and then drop with increasing porosity, which is affected by the fuel an...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2018-09-01
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| Series: | Case Studies in Thermal Engineering |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X18300285 |
| _version_ | 1818425111566352384 |
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| author | Qing xuan Meng Guo qing Zhu Miao miao Yu Zhen huan Liang |
| author_facet | Qing xuan Meng Guo qing Zhu Miao miao Yu Zhen huan Liang |
| author_sort | Qing xuan Meng |
| collection | DOAJ |
| description | Upward flame spread characteristics over extruded polystyrene (XPS) foams with different porosities has been analyzed through experiments. In this paper, the average flame height and average maximum flame temperature first rise and then drop with increasing porosity, which is affected by the fuel and oxygen competition mechanisms. For P (the porosity of XPS samples) ≤ 35%, the positive effect of pores plays a dominant role; the average flame height and average maximum flame temperature increase with the increasing porosity. While the negative effect of pores plays a dominant role when P > 35%, causing the average flame height and average maximum flame temperature decrease with the increasing porosity. Modeling and experiments were conducted to study the heat flux from flame. The value of radiation is obviously higher than convection through formula derivation and the experimental results have high similarity with the theoretical results. Keywords: XPS, Porosity, Upward flame spread characteristics, Heat transfer |
| first_indexed | 2024-12-14T14:08:45Z |
| format | Article |
| id | doaj.art-21cd0d12257943678d15d58e76cc5ffb |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-12-14T14:08:45Z |
| publishDate | 2018-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-21cd0d12257943678d15d58e76cc5ffb2022-12-21T22:58:22ZengElsevierCase Studies in Thermal Engineering2214-157X2018-09-0112365373Experimental study on upward flame spread characteristics of external thermal insulation material under the influence of porosityQing xuan Meng0Guo qing Zhu1Miao miao Yu2Zhen huan Liang3School of Safety Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; Ministry of Education Key Laboratory of Gas and Fire Control for Coal Mines, Xuzhou, Jiangsu 221116, China; Fire Research Institute, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Safety Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; Ministry of Education Key Laboratory of Gas and Fire Control for Coal Mines, Xuzhou, Jiangsu 221116, China; Fire Research Institute, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; Corresponding author at: School of Safety Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China.School of Safety Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; Ministry of Education Key Laboratory of Gas and Fire Control for Coal Mines, Xuzhou, Jiangsu 221116, China; Fire Research Institute, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Safety Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; Ministry of Education Key Laboratory of Gas and Fire Control for Coal Mines, Xuzhou, Jiangsu 221116, China; Fire Research Institute, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaUpward flame spread characteristics over extruded polystyrene (XPS) foams with different porosities has been analyzed through experiments. In this paper, the average flame height and average maximum flame temperature first rise and then drop with increasing porosity, which is affected by the fuel and oxygen competition mechanisms. For P (the porosity of XPS samples) ≤ 35%, the positive effect of pores plays a dominant role; the average flame height and average maximum flame temperature increase with the increasing porosity. While the negative effect of pores plays a dominant role when P > 35%, causing the average flame height and average maximum flame temperature decrease with the increasing porosity. Modeling and experiments were conducted to study the heat flux from flame. The value of radiation is obviously higher than convection through formula derivation and the experimental results have high similarity with the theoretical results. Keywords: XPS, Porosity, Upward flame spread characteristics, Heat transferhttp://www.sciencedirect.com/science/article/pii/S2214157X18300285 |
| spellingShingle | Qing xuan Meng Guo qing Zhu Miao miao Yu Zhen huan Liang Experimental study on upward flame spread characteristics of external thermal insulation material under the influence of porosity Case Studies in Thermal Engineering |
| title | Experimental study on upward flame spread characteristics of external thermal insulation material under the influence of porosity |
| title_full | Experimental study on upward flame spread characteristics of external thermal insulation material under the influence of porosity |
| title_fullStr | Experimental study on upward flame spread characteristics of external thermal insulation material under the influence of porosity |
| title_full_unstemmed | Experimental study on upward flame spread characteristics of external thermal insulation material under the influence of porosity |
| title_short | Experimental study on upward flame spread characteristics of external thermal insulation material under the influence of porosity |
| title_sort | experimental study on upward flame spread characteristics of external thermal insulation material under the influence of porosity |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X18300285 |
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