Accession Number:

AD0639942

Title:

INFRA-RED STUDY OF FLAME STRUCTURE.

Descriptive Note:

Technical rept.,

Corporate Author:

IMPERIAL COLL OF SCIENCE AND TECHNOLOGY LONDON (ENGLAND) DEPT OF CHEMICAL ENGINEERING AND CHEMICAL TECHNOLOGY

Personal Author(s):

Report Date:

1962-12-12

Pagination or Media Count:

23.0

Abstract:

A burner and optical systems have been developed which make it possible to traverse the structure of lean flat flames by an infra-red beam, without intervening windows, and record the absorption at various wavelengths as a function of gas temperature. It was found that 1 a flame can be used as a stationary temperature distribution at constant pressure for the purpose of calibrating infrared absorption, providing the species examined is an inert component and remains in equilibrium with local temperature 2 free radicals and other unstable species are not present in lean limit flames in sufficient concentration to be detectable in flames of about 12 cm optical path 3 the method can be used to follow the disappearance, or first appearance, of major species such as reactants, products or stable intermediates 3 although it is possible to calibrate absorption quantitatively for the determination of species concentration under equilibrium conditions, such calibrations cannot be applied to the species while it is undergoing reaction.

Subject Categories:

  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE