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Multi-Dimensional Modeling of Gas Exchange and Fuel-Air Mixing Processes in a Direct-Injection, Gas Fueled Engine
Technical Paper
2011-24-0036
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Direct-injection technology represents today a very interesting
solution to the typical problems that are generally encountered in
SI, gas-fueled engines such as reduced volumetric efficiency,
backfire and knock. However, development of suitable injection
systems and combustion chamber geometry is necessary to optimize
the fuel-air mixing and combustion processes. To this end, CFD
models are widely applied even if the influence of the mesh
structure, numerical and turbulence models on the computed results
are still matter of investigation.
In this work, a numerical methodology for the simulation of the
gas exchange and injection processes in gas-fueled engines was
developed within the Lib-ICE framework, which is a set of libraries
and applications for IC engine modeling developed using the
OpenFOAM® technology. The gas exchange and fuel injection processes
were simulated into a four-valve, pent-roof hydrogen-fueled engine
with optical access. The availability of experimental optical data
of charge motions within the cylinder and equivalence ratio
distributions during injection allowed a detailed validation of the
proposed approach. In particular the effects of different
turbulence models and mesh structures were investigated.
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Authors
Citation
Lucchini, T., D'Errico, G., and Fiocco, M., "Multi-Dimensional Modeling of Gas Exchange and Fuel-Air Mixing Processes in a Direct-Injection, Gas Fueled Engine," SAE Technical Paper 2011-24-0036, 2011, https://doi.org/10.4271/2011-24-0036.Also In
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