Abstract
Three-dimensional numerical simulations of mixture formation, autoignition, and combustion processes in a cylinder of a sample Diesel engine using the detailed reaction mechanism of fuel oxidation are performed. Particular attention is paid to the autoignition process. The three-stage nature of fuel autoignition in a Diesel engine characterized by the successive appearance of cool, blue, and hot flame exothermic centers has been observed computationally for the first time. The specific features of each of the three stages of autoignition and their interaction with each other are revealed. The location of the first centers of autoignition is identified. The influence of the parameters of numerical procedure on the calculated characteristics of multistage autoignition is investigated. The influence of the fuel Cetane number on the engine operation process is discussed.
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Acknowledgements
The work was supported by the subsidies given to the Semenov Federal Research Center for Chemical Physics of the Russian Academy of Sciences to implement the state assignment on the topic No. 0082-2019-0006 and to the Federal State Institution “Scientific Research Institute for System Analysis of the Russian Academy of Sciences” to implement the state assignment on the topic No. 0580-2021-0005.
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Frolov, S.M., Sergeev, S.S., Basevich, V.Y., Frolov, F.S., Basara, B., Priesching, P. (2022). Simulation of Multistage Autoignition in Diesel Engine Based on the Detailed Reaction Mechanism of Fuel Oxidation. In: Parikyan, T. (eds) Advances in Engine and Powertrain Research and Technology. Mechanisms and Machine Science, vol 114. Springer, Cham. https://doi.org/10.1007/978-3-030-91869-9_6
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