A mixing and deformation mechanism for a supercritical fuel droplet

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Combustion and Flame; (USA)

DOI:https://doi.org/10.1016/0010-2180(90)90069-4· OSTI ID:6806599

Lee, H S; Fernandez-Pello, A C; Corcos, G M; Oppenheim, A K ^[1]

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1. Dept. of Mechanical Engineering, Univ. of California, Berkeley, CA (US)

A model is developed of the dispersion of a vapor fuel droplet that is suddenly set in motion in a gaseous environment that has a density similar to that of the fuel vapor. The objective of the analysis is to describe the mixing and deformation process encountered by a supercritically preheated fuel droplet that is suddenly injected in a gaseous environment that is well above the thermodynamic critical temperature and pressure of the fuel. The initial droplet injection process is modeled by instantaneously creating a potential flow around a moving spherical gaseous droplet, i.e., initially imposing a harmonic vortex sheet at the droplet surface. In the analysis, the transient, axisymmetric, stream function- vorticity and species equations are solved to determine the evolution of the vorticity distribution, species mixing, and the distortion of the initial interface. A time series expansion solution is developed for small times, and a fully numerical procedure is used to extend it to longer times. Specific results are obtained for Reynolds numbers of 50 and 200.

• OSTI ID: 6806599
• 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

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
CRITICAL TEMPERATURE
DEPOSITION
DROPLETS
FLAME SPRAYING
FLAMES
FLUIDS
FUELS
GAS FUELS
GASES
KINETICS
NUMERICAL SOLUTION
PARTICLES
PHYSICAL PROPERTIES
REACTION KINETICS
REYNOLDS NUMBER
SPRAY COATING
SUPERCRITICAL STATE
SURFACE COATING
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
TRANSITION TEMPERATURE
VAPORS