Modeling Ignition and Combustion in Spark-ignition Engines Using a Level Set Method 2003-01-0722
An improved discrete particle ignition kernel (DPIK) model and the G-equation combustion model have been developed and implemented in KIVA-3V. In the ignition model, the spark ignition kernel growth is tracked by Lagrangian markers and the spark discharge energy and flow turbulence effects on the ignition kernel growth are considered. The predicted ignition kernel size was compared with the available measurements and good agreement was obtained. Once the ignition kernel grows to a size where the turbulent flame is fully developed, the level set method (G-equation) is used to track the mean turbulent flame propagation. It is shown that, by ignoring the detailed turbulent flame brush structure, fine numerical resolution is not needed, thus making the models suitable for use in multidimensional modeling of SI engine combustion. To test the ignition and combustion models, they were applied to a homogeneous charge pancake geometry-combustion-chamber engine for which experimental heat flux data from probes in the engine head and cylinder liner was available. By comparing the flame arrival timings with the simulations, the ignition and combustion models were validated. In addition, the models were also applied to a homogenous charge Caterpillar converted propane-fueled engine. Good agreement with experimental cylinder pressures and NOx data was obtained as a function of ignition timing, engine speed and EGR levels.
Citation: Tan, Z. and Reitz, R., "Modeling Ignition and Combustion in Spark-ignition Engines Using a Level Set Method," SAE Technical Paper 2003-01-0722, 2003, https://doi.org/10.4271/2003-01-0722. Download Citation
Author(s):
Zhichao Tan, Rolf D. Reitz
Affiliated:
Engine Research Center, University of Wisconsin-Madison
Pages: 15
Event:
SAE 2003 World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Modeling of SI Engines-SP-1745, SAE 2003 Transactions Journal of Engines-V112-3
Related Topics:
Ignition timing
Spark ignition engines
Engine cylinders
Combustion and combustion processes
Simulation and modeling
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