Effect of reduced ambient pressures and opposed airflows on the flame spread and dripping of LDPE insulated copper wires

Gagnon, Lauren; Fernandez-Pello, Carlos; Urban, James L.; Carey, Van P.; Konno, Yusuke; Fujita, Osamu

Effect of reduced ambient pressures and opposed airflows on the flame spread and dripping of LDPE insulated copper wires

Gagnon, Lauren; Fernandez-Pello, Carlos; Urban, James L. et al.

Fire safety journal, 2021, 120, 103171

Permalink : https://hdl.handle.net/2115/86313

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アクセス権	open access
URI	https://hdl.handle.net/2115/86313
タイトル	Effect of reduced ambient pressures and opposed airflows on the flame spread and dripping of LDPE insulated copper wires
著者	Gagnon, Lauren ; Fernandez-Pello, Carlos ; Urban, James L. ; Carey, Van P. ; Konno, Yusuke ; Fujita, Osamu
著者名 Gagnon, Lauren
著者名 Fernandez-Pello, Carlos
著者名 Urban, James L.
著者名 Carey, Van P.
著者名 Konno, Yusuke
e-Rad_Researcher 10183930 著者名 Fujita, Osamu
言語	英語
キーワード	Electrical wires
	Reduced and atmospheric pressures
	Opposed flow
	Flame spread rate
	Insulation dripping
発行日	2021-03
出版者	Elsevier
収録物名	Fire safety journal
巻(号)	120
ページ	103171
抄録	The effect of ambient pressure on flame spread and insulation dripping of copper-cored, LDPE-insulated wires exposed to opposed airflows was investigated to increase understanding of electrical wire fire hazards in spacecraft environments. Utilized wire samples consisted of 0.64 mm-diameter copper cores surrounded by 4 mm-outer diameter LDPE insulation sheaths. The wire characteristics were selected for comparison with future experiments planned in the International Space Station (ISS) with similar wires. Environmental pressure was varied from sub-atmospheric (40 kPa) to atmospheric (100 kPa). Wires oriented horizontally were exposed to opposed airflows with speeds of 10 or 20 cm/s. Results showed that flame spread rates increase with pressure and decrease with increasing opposed flow speeds. Melted and burning insulation left behind by flame spread dripped with a frequency that increased with pressure; the total mass dripped decreased with pressure. It was also found that lower flows produced more frequent dripping with less total mass dripped, and higher flows produced the opposite. Coincidingly, as the mass of dripped insulation increased, the flame spread rate decreased. Comparison of present results with those from studies with different wire samples show that the effect of environmental parameters on flame spread and insulation dripping depends strongly on core conductivity and core/insulation diameters. Consequently, care should be taken in extending results obtained from specific wire tests to other wires without justification.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
権利情報	© [2021]. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
PISSN	0379-7112
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.firesaf.2020.103171