Effect of gravity on laminar premixed gas combustion. I. Flammability limits and burning velocities

Journal Article · Fri Nov 01 04:00:00 EST 1985 · Combust. Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(85)90139-7· OSTI ID:5629167

Ronney, P D; Wachman, H Y

A comparison of fuel-lean flammability limits and burning velocities in closed vessels for methane-air mixtures between zero-g and one-g at initial pressure of 50-1500 torr, made possible by the elimination of natural convection, is presented. Some of the findings are: the one-g upward flammability limit occurs at a mixture which has a burning velocity which is so low that flame propagation is impractical, that the one-g downward flammability limit is related to the inability of the flame front to propagate downward against buoyant forces, and that near-limit flame propagation at zero-g is mostly independent of the experimental apparatus. 33 references.

• Research Organization: NASA, Lewis Research Center, Cleveland, OH; MIT, Cambridge, MA
• OSTI ID: 5629167
• Journal Information: Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 62; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
AIR
ALKANES
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION PROPERTIES
DISPERSIONS
FLAME PROPAGATION
FLAMMABILITY
FLUID FLOW
FLUIDS
GASES
GRAVITATION
HYDROCARBONS
LAMINAR FLOW
METHANE
MIXTURES
ORGANIC COMPOUNDS
OXIDATION
STABILITY
THERMOCHEMICAL PROCESSES