Theoretical studies on heterogeneous combustion. Progress report, March 1, 1981-December 15, 1981
In most of the liquid-fueled chemical power plants the fuel is usually introduced into the combustor in the form of a spray jet consisting of an ensemble of droplets. The spray subsequently ignites and burns, releasing chemical energy to perform work and, at the same time, producing trace pollutants which are subsequently exhausted. In order to improve the combustor performance in terms of cleanliness and efficiency, understanding of the combustion characteristics of fuel spray is essential. The present program aims to study the various heterogeneous processes involved during (1) vaporization, ignition, deflagration, and extinction of single fuel droplets in the reactive environment simulating the spray interior, and (2) the vaporization, ignition, and combustion of the spray as a whole. The approach is primarily theoretical, although occasionally simple experiments have been conducted to complement the theoretical predictions. The following projects were completed this quarter and are described in this report: explosions with chain branching; assessment of importance of gas-phase transient diffusion in droplet combustion; droplet flame structure with combined forced and buoyant convection; and review of articles on droplet vaporization and combustion.
- Research Organization:
- Northwestern Univ., Evanston, IL (USA). Dept. of Mechanical and Nuclear Engineering
- DOE Contract Number:
- AS02-77ER04433
- OSTI ID:
- 5710042
- Report Number(s):
- DOE/ER/04433-5; ON: DE82006911
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION KINETICS
COMBUSTORS
DROPLETS
EVAPORATION
EXPLOSIONS
FLAMES
FOSSIL-FUEL POWER PLANTS
FUELS
KINETICS
LIQUID FUELS
MATHEMATICAL MODELS
OXIDATION
PARTICLES
PHASE TRANSFORMATIONS
POWER PLANTS
REACTION KINETICS
RESEARCH PROGRAMS
SPRAYS
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION KINETICS
COMBUSTORS
DROPLETS
EVAPORATION
EXPLOSIONS
FLAMES
FOSSIL-FUEL POWER PLANTS
FUELS
KINETICS
LIQUID FUELS
MATHEMATICAL MODELS
OXIDATION
PARTICLES
PHASE TRANSFORMATIONS
POWER PLANTS
REACTION KINETICS
RESEARCH PROGRAMS
SPRAYS
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES