Abstract
Reduction of pollutant emissions in diesel engines passes through a perfect knowledge and control of all phenomena related to combustion. This can be done by experimental observations and physical modeling for simulation of turbulent reactive flows using CFD tools. This paper presents a synthesis of numerical investigations performed for two direct injection diesel engines. The first one is a laboratory single-cylinder diesel engine and the second one is a serial turbocharged heavy duty diesel engine with six cylinders. Three combustion modeling approaches were used and computations were achieved using different versions of Kiva code. The first one uses the Westbrook combustion model with a one-step single kinetic reaction. The second approach is based on the generic chemical mechanism Shell coupled to the model of characteristic time of combustion. The last approach is based on modeling combustion-turbulence interactions using generalized PaSR concept. In the last approach a skeletal mechanism with 246 equations and 60 chemical species has been used. A set of simulations was carried out for five loads at 1500 rpm for the laboratory engine and 1400 rpm for the serial engine under partial load. Results and comments are presented and discussed.
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Bencherif, M., Sahnoun, R., Liazid, A. (2017). Turbulent Combustion Modeling in Compression Ignition Engines. In: Boukharouba, T., Pluvinage, G., Azouaoui, K. (eds) Applied Mechanics, Behavior of Materials, and Engineering Systems. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-319-41468-3_40
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DOI: https://doi.org/10.1007/978-3-319-41468-3_40
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