Accession Number : ADA189631

Title :   Application of Laser-Induced Fluorescence in an Atmospheric-Pressure Boron-Seeded Flame.

Descriptive Note : Doctoral thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Schneider, Greg R

PDF Url : ADA189631

Report Date : Dec 1987

Pagination or Media Count : 161

Abstract : The purpose of this research was to demonstrate the feasibility of using laser-induced fluorescence (LIF) of boron oxide radicals in atmospheric-pressure flames. Such a demonstration would provide a useful tool with which to probe the detailed combustion chemistry of boron fuels. The radical species sought were BO2 and BO, both having spectra in the visible region of the spectrum. These two species are believed to play critical roles in the boron combustion process. A CH4/air/O2 flame was seeded with BC13 producing the green emission characteristic of boron flames. Unfortunately, it also created significant quantities of aerosols of solid boric acid from the reaction of the BC13 with the water vapor in the building air used in the flame. The burner was 1 cm in diameter and composed of approximately 60 capillary tubes. The burner could be remotely translated in two directions permitting investigation of different regions of the flame.

Descriptors :   *BORON OXIDES, *COMBUSTION, *FLAMES, *LASER INDUCED FLUORESCENCE, AEROSOLS, BAROMETRIC PRESSURE, BORIC ACID, BORON, BURNERS, CHEMICAL RADICALS, CHEMISTRY, EMISSION, FUELS, GREEN(COLOR), METHANE, OXYGEN, SOLIDS, VISIBLE SPECTRA, WATER VAPOR

Subject Categories : Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE