Numerical Simulations of Evaporating Sprays in High Pressure and Temperature Operating Conditions (Engine Combustion Network [ECN])

Report No. ARL-TR-6938
Authors: Luis Bravo and Chol-Bum Kweon
Date/Pages: May 2014; 34 pages
Abstract: A series of evaporating n-dodecane spray numerical studies are conducted under typical diesel engine operating conditions. The objective of this report is to demonstrate the modeling capability of a recently adopted 3D-Computational Fluid Dynamics (CFD) solver and provide expertise in simulations of complex multiphase flows. Two benchmark cases were selected based on the Engine Combustion Network (ECN) collaborators from Sandia National Laboratories (U.S.), and CMT-Motores (Spain). The simulations results were able to accurately predict the results including the standardized "Spray A" single condition at rail pressure 1500 bar and ambient conditions of 900 K and 60 bar (Sandia), and the more challenging conditions including variations in rail pressure 500-1500 bar and fuel temperatures 331-377 K (CMT-Motores). The results show the ability of the simulations to be predictive at various challenging conditions. Similar capabilities are presently available at the U.S. Army Research Laboratory's (ARL's) Spray Combustion Research Laboratory and hence this study provides the benchmarking needed to enable next-phase simulations of our in-house JP-8 data.
Distribution: Approved for public release
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Last Update / Reviewed: May 1, 2014