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Exploratory Studies of Flame and Explosion Quenching. First Annual Technical Progress Report, June 30, 1972--June 30, 1973.

Milne-TA; Beachey-JE; Greene-FT
NTIS: PB/231-991 Available for Reference At Bureau Libraries :61 pages
These studies (Contract No. H0122127) were aimed at the development of improved agents to suppress coal dust-air explosions. The approach employed was to sample both gaseous species and particles from uninhibited and inhibited flames, to obtain basic information about the mechanism of coal dust burning itself and the mode of action of dry-powder fire extinguishing agents. Attempts to stabilize flat, laminar, premixed coal dust-air flames, without any augmentation, are described, culminating in the successful stabilization of flat flames on both 6.3-Cm and 12.6-Cm-diameter meeker-type burners. The combination of a fluidized-bed coal dust feeder, a turbulent mixing region for the coal dust-air at the bottom of a short burner, a corrugated matrix burner, and vibration of the burner matrix, has produced a flame with sufficient stability to warrant direct interfacing with a molecular beam, mass spectrometer sampling system. Dry powder extinguishing agent behavior is being studied.
Publication Date
Document Type
CP; Final Contract Report;
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
OFR 21-74
NIOSH Division
Source Name
NTIS: PB/231-991; Available for Reference At Bureau Libraries
Performing Organization
Midwest Research Institute
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division