Accession Number : AD0267311

Title :   FLAME INHIBITION RESEARCH

Corporate Author : JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB

Report Date : MAY 1961

Pagination or Media Count : 1

Abstract : A spherical flame apparatus was set up for inhibition studies on the system (CH4-0.09, 02-0.179, Ar -0.727, pressure 0.05atm). Composi ion profiles were measured for both the inhibited and uninhibited flames with the same total mass flow. In addition to measuring the concentrations of the species which were stable to sampling, an attempt was made to measure hydrogen-atom concentration profiles using a new device, the scavenger sampling probe. The results were: the addition of inhibitor (X(HBr) equals 0.0015) appreciably lowers the rate of reaction of the major species (CH4, O2 and CO), peak concentrations of the intermediate species (OCH2, CO and H2) are changed and shifted relative to the major species, the apparent concentration of H atoms was depressed almost five-fold by the addition of HBr even in the equilibrium region and HBr was the only bromine containing compound detected (X(Br2) less than 10 to the minus 4th power). Computer calculations were made of the adiabatic temperature and composition of the equilibrium burned gases of some CH4 -O2 -Ar mixtures and the effect of adding small amounts of HBr. (Author)

Descriptors :   *FLAME PROPAGATION, *FLAMES, AERODYNAMIC CHARACTERISTICS, ARGON, ATOMS, BROMIDES, FREE RADICALS, FUEL ADDITIVES, GASES, HALIDES, HYDROGEN, HYDROGEN COMPOUNDS, HYDROXIDES, INHIBITION, METHYL RADICALS, MIXTURES, OXYGEN, REACTION KINETICS, TEST EQUIPMENT, THERMODYNAMICS

Distribution Statement : APPROVED FOR PUBLIC RELEASE