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Heat Transfer Research
Импакт фактор: 1.199 5-летний Импакт фактор: 1.155 SJR: 0.267 SNIP: 0.503 CiteScore™: 1.4

ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2015006863
pages 673-687

WIDTH EFFECT ON A VERTICAL RPU FLAME SPREAD WITH A MIDDLE LINEAR IGNITION

Hengze Zhao
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui, 23 0026, China
Yongming Zhang
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui, 23 0026, China
Yuanming Wang
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui, 23 0026, China
Lanming Zhao
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui, 23 0026, China

Краткое описание

Experiments were conducted in a standard combustion chamber at the USTC in Hefei to investigate the flame spread characteristics with different widths of a thermal insulating material − RPU. The thickness and length of RPU samples were two centimeters and one meter, respectively, but the widths of samples were varied, from 10 cm to 25 cm. The samples were placed vertically on a gypsum board, and a linear ignition was used to ignite them. These experiments can display two fire spread processes − wind-aided wall flame spread and opposed flow wall flame spread. In addition, the heat flux, average flame height, flame spread speed, surface and internal temperatures were studied to determine the wall flame spread characteristics with middle linear ignition. The results demonstrate that the average flame height and flame spread speed within the range show a different trend, and the maximum spread speed of opposed wall fire appears between 14 cm and 18 cm. In addition, these experimental results demonstrate the feasibility of the designed rig in studying the vertical RPU flame spread.


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