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Effects of turbulence mixing, variable properties, and vaporization on spray droplet combustionCombustion 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.
Document ID
19900010010
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Kim, Y. M.
(Alabama Univ. Huntsville, AL, United States)
Chung, T. J.
(Alabama Univ. Huntsville, AL, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1990
Subject Category
Inorganic And Physical Chemistry
Report/Patent Number
NASA-CR-186463
NAS 1.26:186463
Accession Number
90N19326
Funding Number(s)
CONTRACT_GRANT: NAG8-95
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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