TY - JOUR
T1 - Multi-component vapor-liquid equilibrium model for LES of high-pressure fuel injection and application to ECN Spray A
AU - Matheis, Jan
AU - Hickel, Stefan
PY - 2018
Y1 - 2018
N2 - We present and evaluate a two-phase model for Eulerian large-eddy simulations (LES) of liquid-fuel injection and mixing at high pressure. The model is based on cubic equations of state and vapor-liquid equilibrium calculations and can represent the coexistence of supercritical states and multi-component subcritical two-phase states via a homogeneous mixture approach. Well-resolved LES results for the Spray A benchmark case of the Engine Combustion Network (ECN) and three additional operating conditions are found to agree very well with available experimental data. We also address well-known numerical challenges of trans- and supercritical fluid mixing and compare a fully conservative formulation to a quasi-conservative formulation of the governing equations. Our results prove physical and numerical consistency of both methods on fine grids and demonstrate the effects of energy conservation errors associated with the quasi-conservative formulation on typical LES grids.
AB - We present and evaluate a two-phase model for Eulerian large-eddy simulations (LES) of liquid-fuel injection and mixing at high pressure. The model is based on cubic equations of state and vapor-liquid equilibrium calculations and can represent the coexistence of supercritical states and multi-component subcritical two-phase states via a homogeneous mixture approach. Well-resolved LES results for the Spray A benchmark case of the Engine Combustion Network (ECN) and three additional operating conditions are found to agree very well with available experimental data. We also address well-known numerical challenges of trans- and supercritical fluid mixing and compare a fully conservative formulation to a quasi-conservative formulation of the governing equations. Our results prove physical and numerical consistency of both methods on fine grids and demonstrate the effects of energy conservation errors associated with the quasi-conservative formulation on typical LES grids.
KW - Diesel fuel injection
KW - Engine Combustion Network (ECN) Spray A
KW - Large Eddy Simulation (LES)
KW - Supercritical
KW - Transcritical
KW - Vapor-liquid equilibrium (VLE)
UR - http://www.scopus.com/inward/record.url?scp=85033214834&partnerID=8YFLogxK
UR - http://resolver.tudelft.nl/uuid:50a18940-f444-4b67-8214-3c434e3aca33
U2 - 10.1016/j.ijmultiphaseflow.2017.11.001
DO - 10.1016/j.ijmultiphaseflow.2017.11.001
M3 - Article
AN - SCOPUS:85033214834
SN - 0301-9322
VL - 99
SP - 294
EP - 311
JO - International Journal of Multiphase Flow
JF - International Journal of Multiphase Flow
ER -