Investigation of Fuel Additive Effects on Sooting Flames

The objective of this research is to clarify the mechanisms responsible for the suppression of soot in flames by fuel additives. Measurements are limited to well-defined hydrocarbon/air prevaporized liquid- and gaseous-fueled flames. Emphasis is given to ferrocene in a diffusion flame fueled by prev...

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Bibliographic Details
Main Author: Bonczyk, Paul A
Format: Report
Language:English
Subjects:
ADDITIVES
AIR
BURNOUT
COMBUSTION
Combustion and Ignition
CONCENTRATION(CHEMISTRY)
DENSITY
DIAGNOSIS(GENERAL)
FERROCENES
FLAMES
FUEL ADDITIVES
Fuels
HYDROCARBONS
LASERS
METHODOLOGY
OPTICS
OPTIMIZATION
OXIDATION
PARTICLE SIZE
PARTICULATES
PE61102F
PLUMES
REDUCTION
SEEDING
SOOT
SUPPRESSION
VISIBLE SPECTRA
WUAFOSR2308A2
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Summary:The objective of this research is to clarify the mechanisms responsible for the suppression of soot in flames by fuel additives. Measurements are limited to well-defined hydrocarbon/air prevaporized liquid- and gaseous-fueled flames. Emphasis is given to ferrocene in a diffusion flame fueled by prevaporized iso-octane. Nonperturbing laser/optical diagnostic techniques are used to relate changes in soot particulate size, number density, and volume fraction to additive concentration. Ferrocene is observed to suppress a visible soot plume completely and, in general, to intervene at a late combustion stage. Suppression is due to both size and number density reduction, which suggests that ferrocene enhances the oxidative burn-out of soot. In contrast, at an early combustion stage nearer the burner lip, a slight enhancement of soot observed with ferrocene seeding. Keywords: Additive, Ferrocene, Flame, Soot.