Combustion of CNG in charged spark ignition engines / Wladyslaw Mitianiec // W: LES and DNS of Ignition Processes and Complex-Structure Flames with Local Extinction : proceedings of the International COST ... więcej

Combustion of CNG in charged spark ignition engines / Wladyslaw Mitianiec // W: LES and DNS of Ignition Processes and Complex-Structure Flames with Local Extinction : proceedings of the International COST Workshop, Częstochowa, Poland, 20-21 November 2008 [Dokument elektroniczny] / eds. Andrzej Bogusławski, Chris Lacor, Bernard Geurts. – Melville, N.Y. : American Institute of Physics , 2009. – (AIP Conference Proceedings, ISSN 1551-7616 ; 1190). – S. 98-113 : il. – Tryb dostępu: http://scitation.aip.org/content/aip/proceeding/aipcp/10.1063/1.3290172. – Bibliogr. 16 poz., Abstr. – doi: 10.1063/1.3290172. – ISBN 978-0-7354-0726-8

The paper describes mixing of injected CNG with air and combustion process in spark ignition internal combustion engine. Because of higher ignition temperature of CNG the SI engines have more effective ... więcej

The paper describes mixing of injected CNG with air and combustion process in spark ignition internal combustion engine. Because of higher ignition temperature of CNG the SI engines have more effective ignition system than conventional engines. The gas motion, turbulence, charge temperature and obviously electrical energy of the ignition coil have a big influence on the ignition and burning process in the combustion chamber. The paper includes theoretical and experimental investigations of ignition process in the high charged SI engines with direct CNG injection by using LES technique in KIVA program. Simulation of CNG combustion in the caloric chamber was carried in the environment of OpenFOAM program with LES model and also the experimental test was carried out for comparison of results in the chamber with the same geometry. The influence of the “tumble” and “swirl” on the sparking is shown by modelling of this process in premixed charge by using LES technique. The charge motion and also considerably turbulence effect influence strongly on the ignition process