Large Eddy Simulation of Liquid Fuel Spray and Combustion with Gradually Varying Grid

Paper #:
  • 2013-01-2634

Published:
  • 2013-10-14
Citation:
Zhou, L., Luo, K., Jia, M., and Shuai, S., "Large Eddy Simulation of Liquid Fuel Spray and Combustion with Gradually Varying Grid," SAE Technical Paper 2013-01-2634, 2013, https://doi.org/10.4271/2013-01-2634.
Pages:
10
Abstract:
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.
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