FLAMMABILITY IN UNUSUAL ATMOSPHERES. PART 2 - SELECTED MATERIALS IN OXYGEN-NITROGEN AND OXYGEN HELIUM MIXTURES AT PRESSURES UP TO 315 PSIA.
NAVAL RESEARCH LAB WASHINGTON DC
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The Naval Research Laboratory has been investigating the flammability of materials under unusual atmospheric conditions. Ignition and flame spread of several fabrics and paper were measured at pressures from 315 psia down to limiting pressures for ignition. The minimum total pressure limit for standard filter paper used was much lower at 41 O2 than at 21 O2 in O2N2 mixtures. Also, the partial pressure of O2 required for ignition at 41 was much lower than at 21 O2. Although, in general, materials have a faster burning rate in helium mixtures than in nitrogen mixtures, there are some significant exceptions to this finding. The nature of the material has been shown to have a marked influence on the effect that variables, such as pressure, oxygen content, and diluent, have on the rate of burning.
- Combustion and Ignition