External Radiant Flux and Oxygen Concentration as Conditions for Concurrent Flame Spread in Fabrics

2012 ◽  
Author(s):  
Andres Osorio ◽  
A. Fernandez Pello ◽  
David Urban ◽  
Gary Ruff
Keyword(s):  
Oxygen Concentration ◽  
Flame Spread ◽  
Radiant Flux

Opposed Flame Spread over Polyethylene Under Variable Flow Velocity and Oxygen Concentration in Microgravity

2019 ◽  
Vol 56 (1) ◽  
pp. 113-130 ◽  
Author(s):  
Yoshinari Kobayashi ◽  
Kaoru Terashima ◽  
Muhammad Arif Fahmi bin Borhan ◽  
Shuhei Takahashi
Keyword(s):  
Flow Velocity ◽  
Oxygen Concentration ◽  
Flame Spread ◽  
Variable Flow ◽  
Opposed Flame Spread

312 Limitation of Flame Spread over Liquids in Low-Oxygen Concentration Gas Flow

2008 ◽  
Vol 2008.44 (0) ◽  
pp. 97-98
Author(s):  
Tetsuya Okizaki ◽  
Kenji Takimoto ◽  
Akihiko Ito ◽  
Hiroyuki Torikai
Keyword(s):  
Oxygen Concentration ◽  
Flame Spread ◽  
Gas Flow ◽  
Low Oxygen ◽  
Low Oxygen Concentration

Flame Spread And Extinction Over Thermally Thick Pmma In Low Oxygen Concentration Flow

2005 ◽  
Vol 8 ◽  
pp. 457-468 ◽  
Author(s):  
Y. Kudo ◽  
M. Itakura ◽  
Y. Fujita ◽  
A. Ito
Keyword(s):  
Oxygen Concentration ◽  
Flame Spread ◽  
Low Oxygen ◽  
Low Oxygen Concentration

PE and ETFE wire insulation flame morphologies and spread rates under subatmospheric pressures

2020 ◽  
pp. 089270572090409
Author(s):  
Jun Fang ◽  
Yan Xue ◽  
Jingwu Wang ◽  
Xuanze He ◽  
Yue Zhang ◽  
...  
Keyword(s):  
Oxygen Concentration ◽  
Flame Spread ◽  
Combustion Process ◽  
Fire Risk ◽  
Polymeric Coating ◽  
Negative Effect ◽  
The Difference ◽  
Limiting Oxygen Concentration ◽  
Combustible Gases ◽  
Fire Threat

Understanding the effects of pressure and oxygen concentration on the flame spread behaviors of electrical wires is crucial for establishing fire safety strategies for plateau cities, aircraft, and spacecraft. During the combustion, the polymeric coating first liquefies to form molten agglomerations, after which these droplets boil to release combustible gases that propagate the combustion process, which brings a potential fire threat. To better evaluate this fire risk, the flame spread of polyethylene (PE) and ethylene tetrafluoroethylene (ETFE)-insulated nichrome wires was investigated in a subatmospheric cabin. During the combustion of the insulation, the PE flame always presents a closed teardrop-like structure, while at the limiting oxygen concentration condition, the ETFE flame presents an asymmetric pentagram-like structure due to uneven heat losses. In this experiment, dripping was exhibited only by the PE insulation mainly because of the difference in surface tension. When the oxygen concentration was raised from 21% to 30%, the critical pressure for dripping shifts from 60 kPa to 38 kPa. Air pressure has a slight negative effect on flame spread rates, because, at lower pressure, the burning rate is lower, but the heat loss and convective and radiant heats of the flame decrease.

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