The potential of statistical RANS to predict knock tendency: Comparison with LES and experiments on a spark-ignition engine

A. d'Adamo, S. Breda, F. Berni and S. Fontanesi

Applied Energy, 2019, vol. 249, issue C, 126-142

Abstract: Pollutant regulations and fuel consumption concerns are the driving guidelines for increased thermal efficiency and specific power in current internal combustion engines. The achievement of such challenging tasks in Spark Ignition units is often limited by the onset of knock, which hinders the possibility to operate the engine with the optimal combustion phasing. The sporadic occurrence of individual knocking events is related to cycle-to-cycle variability of turbulent combustion. This is avoidable by only accepting a safety margin from its earliest onset.

Keywords: Cycle-to-cycle variability; Large-Eddy simulation; Statistical RANS; Combustion; Auto-ignition; Knock intensity (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (6)

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DOI: 10.1016/j.apenergy.2019.04.093

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