Effects of turbulence mixing, variable properties, and vaporization on spray droplet combustion

Technical Report · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6816113

Kim, Y M; Chung, T J

Combustion of liquid fuels in the form of spray droplets is simulated numerically. Various vaporization models are examined as to their performance in finite element calculations involving a turbulent flow field. The Eulerian coordinate for the gas and Lagrangian coordinate for the liquid spray droplets are coupled through source terms being updated in the equations of continuity, momentum, and energy. The k-epsilon and modified eddy breakup models are used for simulating turbulent spray combustion flow field. Numerical results for the droplet trajectories, droplet heating, recirculation characteristics, and effects of evaporation models are evaluated. It is also shown that the finite element method is advantageous in dealing with complex geometries, complex boundary conditions, adaptive unstructured grids.

• Research Organization: Alabama Univ., Huntsville, AL (USA)
• OSTI ID: 6816113
• Report Number(s): N-90-19326; NASA-CR--186463; NAS--1.26:186463
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
DATA
DROPLETS
ENERGY
EVAPORATION
FINITE ELEMENT METHOD
FLUID FLOW
FUELS
INFORMATION
KINETIC ENERGY
KINETICS
LIQUID FUELS
MIXING
NUMERICAL DATA
NUMERICAL SOLUTION
PARTICLES
PHASE TRANSFORMATIONS
REACTION KINETICS
SIMULATION
SPRAYS
TEMPERATURE EFFECTS
THEORETICAL DATA
TRAJECTORIES
TURBULENCE
TURBULENT FLOW
VORTICES