Ramjet fuel studies. Part 1. Carbon. Progress report, Jul 1969--Jul 1970

Technical Report · Thu Jul 01 04:00:00 EDT 1971

OSTI ID:7310274

Bryant, J T; Burdette, G W

A convenient apparatus for dispersing uniform clouds of solid particles for laboratory dust-flame experiments has been tested. The combustion characteristics of premixed laminar graphite-oxygen-nitrogen flames, both with and without added hydrocarbon, have been studied at atmospheric pressure. The variation of particle burning time with initial oxygen partial pressure and oxygen/fuel ratio has been described by first-order combustion kinetics, with due consideration for oxygen depletion during burnout. Flame velocity measurements indicate very slow propagation of the above mixes when compared with that of hydrocarbon sprays and aluminum clouds of similar particle diameter and concentration. Added chlorine did not measurably affect graphite combustion up to concentrations of 2.5 vol. % in the presence of added hydrocarbon, but mixes of less than 0.8 vol. % of chlorine extinguished pure graphite-oxygen flames. The addition of 1.5 to 4.75 wt. % of lead acetate visibly stabilized the graphite-oxygen flame, but the effect on the flame velocity and burning rate could not be measured. Stable suspensions of 60 wt. % carbon black in various hydrocarbons have been prepared. The initial phases of the chemical and physical properties evaluation of these are reported. (Author) (GRA)

• Research Organization: Naval Weapons Center, China Lake, CA (USA)
• OSTI ID: 7310274
• Report Number(s): AD-886596; NWC-TP-4810-PT-1
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ACETATES
CARBON
CARBOXYLIC ACID SALTS
CHEMICAL REACTION KINETICS
CHLORINE
COMBUSTION KINETICS
ELEMENTS
FLAME PROPAGATION
FUELS
HALOGENS
JET ENGINE FUELS
KINETICS
NONMETALS
REACTION KINETICS