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Mathematical Problems in Engineering
Volume 2017, Article ID 6825079, 12 pages
https://doi.org/10.1155/2017/6825079
Research Article

Numerical Study of the Performance and Emission of a Diesel-Syngas Dual Fuel Engine

Merchant Marine College, Shanghai Maritime University, Shanghai, China

Correspondence should be addressed to Shiquan Feng; moc.kooltuo@nauqihsgnef

Received 11 May 2017; Revised 18 September 2017; Accepted 28 September 2017; Published 25 October 2017

Academic Editor: Anna Vila

Copyright © 2017 Shiquan Feng. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Based on the theory of direct relation graph (DRG) and the sensitivity analysis, a reduced mechanism for the diesel-syngas dual fuel was constructed. Three small thresholds were applied in the process of the detailed mechanism simplification by DRG, and a skeletal mechanism with 185 elements and the 832 elementary reactions was obtained. According to the framework of the skeletal mechanism, the time-consuming approach of sensitivity analysis was employed for further simplification, and the skeletal mechanism was further reduced to the size of 158 elements and 705 reactions. The Chemkin software with the detailed mechanism was utilized to calculate the effect of syngas addition on the combustion characteristics of diesel combustion. The findings showed that the addition of syngas could reduce the ignition delay time and increase the laminar flame speed. Based on the reduced mechanism and engine parameters, a 3D model of the engine was constructed with the Forte code. The 3D model was adopted to study the effect of syngas addition on the performance and exhaust emissions of the engine and the relevant data of the experiment was used in the calibration of the 3D model.