Analysis of dropwise ignition versus external ignition for dilute multicomponent fuel sprays
- Dept. of Mechanical Engineering, Univ. of Illinois at Chicago, Chicago, IL (US)
An attempt has been made to identify conditions for dropwise ignition and spray ignition. Both pure as well as multicomponent fuels are considered. For dropwise ignition, an existing criterion has been modified to account for the nonlinear dependence of reaction rate on fuel and oxygen concentrations and to account for the multicomponent nature of the fuel. The external or spray ignition is considered through the zero heat flux condition at the ignition source. The effect of chemical kinetics is examined by employing reaction schemes with unity as well as nonunity exponents of fuel and oxygen concentrations. Results indicate that for most of the conditions considered, the individual droplet ignition is favored over the external ignition.
- OSTI ID:
- 6545080
- Journal Information:
- Combustion and Flame; (USA), Journal Name: Combustion and Flame; (USA) Vol. 81:1; ISSN 0010-2180; ISSN CBFMA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
DEPOSITION
DISPERSIONS
DROPLETS
ELEMENTS
FLAME SPRAYING
FLAMES
FUELS
HEAT FLUX
KINETICS
MIXTURES
NONLINEAR PROBLEMS
NONMETALS
OXYGEN
PARTICLES
REACTION KINETICS
SPRAY COATING
SURFACE COATING