Accession Number:

AD0271125

Title:

STUDY OF THE MECHANISMS OF FIRE EXTINGUISHMENT OF PROPELLANTS

Descriptive Note:

Corporate Author:

STANFORD RESEARCH INST MENLO PARK CALIF

Report Date:

1961-07-01

Pagination or Media Count:

1.0

Abstract:

A study was made of the inhibition of various premixed flames by 2 classes of chemicals volatile halogen-containing compounds and finely divided powders. Some of each class were effective inhibitors of hydrocarbon combustion. Inhibition by volatile halogen compounds involves at least 2 types of reaction a between chain carriers and the undecomposed halogen compound, and b between chain carriers and the decomposition or oxidation products of the halogen compound. Inhibition by powders probably involves these successive steps heating the powder particles to a high temperature by the hot flame gases, partial evaporation of the powder particles, decomposition or reaction of the evaporated material to provide metal atoms, and inhibition of the combustion process by the liberated metal atoms. It is believed that combustion is impeded by deactivating excited molecules which may be important intermediates in the burning process. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE