Combustion modelling of turbulent jet ignition in a divided combustion chamber

نویسندگان

چکیده

Turbulent jet ignition is seen as one of the most promising strategies to achieve stable lean-burn operation in modern spark-ignition engines thanks its ability promote rapid combustion. A nearly stoichiometric mixture ignited a small-volume pre-chamber, following which multiple hot turbulent jets are discharged main chamber initiate In present work, detailed computational investigation on combustion regime premixed rich propane/air quiescent divided vessel carried out, study characteristics flame without uncertainties mixing and conditions typical real-engine operations. particular, paper investigates dependency propagation nozzle diameter (4, 6, 8, 12 14 mm) pre-chamber/main-chamber volume ratio (10% 20%); CFD results compared experimental outcomes. Results show that pre-chamber follows well-stirred reaction mode, rendering limitation using conventional flamelet models. Furthermore, due very high turbulence levels generated by outflowing reacting jets, also develops reactor type, confirming need for kinetics-based approach modelling. However, picture complicated thickened possibly being verified some geometrical variations (nozzle volume). The general good alignment with data terms both phasing duration, offering renewed guideline simulations under low Damköhler number conditions.

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ژورنال

عنوان ژورنال: International Journal of Engine Research

سال: 2021

ISSN: ['2041-3149', '1468-0874']

DOI: https://doi.org/10.1177/14680874211037118