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Efficient 3-D CFD Combustion Modeling with Transient Flamelet Models
Technical Paper
2008-01-0957
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A transient interactive flamelet model and a transient flamelet library based model are used to model a medium-duty diesel fueled engine operating in PCCI mode. The simulations are performed with and without the source term accounting for evaporation in the mixture fraction variance equation. Reasonable agreement is found with the experiments with both models. The effect of the evaporation source term in the mixture fraction variance equation is different for the different transient flamelet approaches. For the transient interactive flamelet model the ignition onset is delayed as a consequence of the higher mixture fraction variance, which leads to a higher scalar dissipation rate. The evaporation source term does not affect the global characteristics of the ignition event for the transient flamelet progress variable model, but locally the initial combustion is occurring differently.
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Citation
Lehtiniemi, H., Zhang, Y., Rawat, R., and Mauss, F., "Efficient 3-D CFD Combustion Modeling with Transient Flamelet Models," SAE Technical Paper 2008-01-0957, 2008, https://doi.org/10.4271/2008-01-0957.Also In
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