The possibility of a reversal of material flammability ranking from normal gravity to microgravity

The purpose of the discussion is to show, by a theoretical model, that one of the material flammability indices, the flammability limit, can be reversed in proper circumstances. A stagnation-point diffusion flame adjacent to a spherical solid-fuel surface is considered. It is shown that a reversal o...

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Bibliographic Details
Published in:Combustion and flame 1990-06, Vol.80 (3), p.355-357
Main Author: T'ien, James S.
Format: Article
Language:English
Subjects:
330000 - Advanced Propulsion Systems
400800 - Combustion, Pyrolysis, & High-Temperature Chemistry
420400 - Engineering- Heat Transfer & Fluid Flow
657003 - Theoretical & Mathematical Physics- Relativity & Gravitation
ADVANCED PROPULSION SYSTEMS
CALCULATION METHODS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COMBUSTION PROPERTIES
DIFFUSION
ELEMENTS
ENERGY TRANSFER
ENGINEERING
FLAME PROPAGATION
FLAMES
FLAMMABILITY
FUELS
GRAVITATION
HEAT TRANSFER
Inorganic And Physical Chemistry
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
MATERIALS
MATERIALS TESTING
NONMETALS
OXYGEN
SOLIDS
SPACE VEHICLES
SURFACES
TESTING
VEHICLES
VELOCITY
VENTILATION SYSTEMS
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Summary:The purpose of the discussion is to show, by a theoretical model, that one of the material flammability indices, the flammability limit, can be reversed in proper circumstances. A stagnation-point diffusion flame adjacent to a spherical solid-fuel surface is considered. It is shown that a reversal of the limiting oxygen indices from normal gravity and microgravity is possible. Although the example is based on a particular theoretical model with a particular flame configuration and specifically for an oxygen limit, the flammability-limit reversal phenomenon is believed to be more general.
ISSN:0010-2180
1556-2921
DOI:10.1016/0010-2180(90)90111-4