Experimental study on flame merging behavior of spilled flame generated by flame impinging on obstruction

doi:10.16265/j.cnki.issn1003-3033.2021.04.023

China Safety Science Journal ›› 2021, Vol. 31 ›› Issue (4): 171-176.doi: 10.16265/j.cnki.issn1003-3033.2021.04.023

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Experimental study on flame merging behavior of spilled flame generated by flame impinging on obstruction

XING Chaoliang¹, HUANG Xianjia¹, HE Le², ZHU He², ZHENG Zeming¹

1 Joint Laboratory of Nuclear Power Plant Fire Safety, Institute of Industry Technology, Guangzhou & Chinese Academy of Sciences, Guangzhou Guangdong 511458, China;
2 State Key Laboratory of Nuclear Power Monitoring Technology and Equipment, China Nuclear Power Engineering Co., Ltd., Shenzhen Guangdong 518124, China

Received:2021-01-10 Revised:2021-03-07 Online:2021-04-28 Published:2021-12-20

Abstract

Abstract: In order to further study cable fire of multi-layer horizontal cable tray in nuclear power plants, a series of tests for spilled flame merging caused by flame impinging on obstruction were carried out. Experiments were conducted for HRR at 10, 14, 28, 42, 56 and 84 kW and distance between plate and burner at 0.1, 0.2, 0.3, 0.4 and 0.5 m. Then, figure of flame intermittence probability under different conditions were compared and analyzed, and flame merging probability was introduced to describe merging phenomenon. It was found that such behavior can be quantitatively divided according to ratio of HRR to distance between plate and burner. When the ratio is less than 200, it is a non-merging zone as spilled flame does not merge. As the ratio is larger than 600, it will merge constantly, thus a constant-merging zone while between 200 and 600, it merges intermittently, therefore an intermittent-merging zone.

Key words: flame impingement, obstruction, spilled flame, flame merging, heat release rate (HRR)

CLC Number:

X932

XING Chaoliang, HUANG Xianjia, HE Le, ZHU He, ZHENG Zeming. Experimental study on flame merging behavior of spilled flame generated by flame impinging on obstruction[J]. China Safety Science Journal, 2021, 31(4): 171-176.

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Experimental study on flame merging behavior of spilled flame generated by flame impinging on obstruction

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