Experimental studies on the dual-fuel sequential combustion and emission simulation

CATEGORY: COMBUSTION
Energy, Volume 51, 1 March 2013, Pages 358–373
Experimental studies on the dual-fuel sequential combustion and emission simulation
Xingcai Lu, Xiaoxin Zhou, Libin Ji, Zheng Yang, Dong Han, Chen Huang, Zhen Huang
Key Lab. for Power Machinery and Engineering of M. O. E., Shanghai Jiao Tong University, 200240 Shanghai, PR China
Abstract
Authors demonstrate the simultaneous reductions of NOx and soot using dual-fuel sequential combustion (DFSC), an innovative combustion mode, on a single-cylinder engine.
DFSC introduces a well-mixed, lean fuel/air mixture into the cylinder by injecting high-cetane number fuel  at the intake port, followed by the direct injection of a high-octane number fuel  near the top dead center (TDC). Four fuel combinations were operated with the DFSC mode. Authors examined the ignition mechanism and combustion processes of each fuel combination. Preliminary results reveal that the HC emissions originate primarily from the core region of the spray jet, where the fuel injection tip was unable to fully oxidize and burn. The CO emissions occur primarily at the boundary layer of the cylinder wall, piston ring crevice region, and combustion chamber bowl.
Full Text Source (Subscription or Fee): http://www.sciencedirect.com/science/article/pii/S0360544213000467