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Lean Burn Gas Engine with a Pre Chamber Ignition System: Grid Independence Study and Design Optimization

Ghael, Kamlesh; Rosenthal, Felix; Blesinger, Georg; Toedter, Olaf; Koch, Thomas

Abstract (englisch):
Pre-chamber ignition systems are used in the lean burn gas engines to avail benefits of low emissions and high efficiency. Numerical investigations of these pre-chamber ignition systems are challenging due to the requirement of local refinement inside the pre-chamber, especially between the electrodes. In addition, high pressurized jets from the pre-chamber small holes require jet-directed fine mesh, which is quite challenging with the cylinder hexahedron coarse moving mesh. In the present work, a specialized mesh with the optimized spatial grid size distribution of the single cylinder engine with pre-chamber ignition system is generated and the influence of the pre-chamber geometry on charge motion and exhaust gas residuals inside pre-chamber is numerically investigated.
Firstly, grid independence study of a single cylinder engine and pre-chamber ignition system is conducted respectively and validated with experimental data of the open cycle at motored operation for reference geometry. Afterward, a study of pre-chamber ignition system geometry is conducted using an open-cycle mesh (valves and piston motion are included), to optimize the charge motion and exhaust gas residuals inside the pre-chamber. ... mehr

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Volltext §
DOI: 10.5445/IR/1000105517
Veröffentlicht am 21.02.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Kolbenmaschinen (IFKM)
Publikationstyp Vortrag
Publikationsdatum 03.12.2019
Sprache Englisch
Identifikator KITopen-ID: 1000105517
Veranstaltung Simcenter Conference (2019), Amsterdam, Niederlande, 02.12.2019 – 04.12.2019
Schlagwörter Grid independence study, charge motion, turbulent kinetic energy (TKE), exhaust gas residuals, pre-chamber ignition system, es-ice/Star-CD
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