In this work, large eddy simulation (LES) with a K-equation subgrid turbulent kinetic energy model is implemented into the CFD code KIVA3V to study the features of liquid fuel spray and combustion using gradually varying grid in a constant volume chamber. The characteristic time-scale combustion model (CTC) incorporating a turbulent timescale is adopted to predict the combustion process and the SHELL auto-ignition model is used to predict auto-ignition. Combustion is also simulated using Parallel Detailed Chemistry with Lu's n-heptane reduced mechanism (58 species), which has been added into the KIVA3V-LES code. The computational results are compared with Sandia experimental data for non-reacting and reacting cases. As a result, LES can capture the complex structure of the spray and temperature distribution as well as the trend of ignition delay and flame lift-off length variations. Better results are obtained using the Parallel Detailed Chemistry than the CTC model.
Large Eddy Simulation of Liquid Fuel Spray and Combustion with Gradually Varying Grid
Sae Technical Papers
SAE/KSAE 2013 International Powertrains, Fuels & Lubricants Meeting ; 2013
2013-10-14
Aufsatz (Konferenz)
Englisch
Large Eddy Simulation of Liquid Fuel Spray and Combustion with Gradually Varying Grid
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