【作者】

Yue Li

【摘要】

该论文已在赫尔辛基举行的第28届CIMAC世界大会上发表，论文的版权归CIMAC所有。 The micro ignition dual fuel engine is one of the most effective means to achieve energy conservation and emissions reduction. It not only improves the engine emissions, but also retains the high efficiency. The mixture of natural gas and air is ignited by a bit of diesel near the end of the compression stroke. Therefore, the investigation of the diesel injection law has an important effect on the combustion and emission performance optimizing of micro ignition dual fuel engine. In this paper, a three-dimensional CAD software CATIA was used to simulate the geometric modeling of 2135G combustion chamber structure. Meshing and numerical calculations were accomplished in the software AVLFIRE. Using methane chemical kinetic mechanism as a combustion model, the chemical kinetic mechanism and CFD model coupling calculating was adopted. The coupling calculation results was compared with 2135G dual fuel engine experimental data, comparative results showed that they are in good agreement. It is proved that numerical model can effectively predict the influence of diesel injection law to the actual work process in a dual fuel engine. The influence of fuel injection law to micro ignition dual fuel engine combustion process was investigated in this paper. The influential factors are divided into diesel injection timing and quality of ignition diesel. The results showed that when the quality of ignite diesel is fixed, advanced the injection timing appropriately was conducive to atomization of diesel. This could provide more ignition energy and ignition source, and it was in favor of diesel igniting natural gas. These measures could lead to a fast and complete combustion, CO emission reduced, power performance improved, but nitrogen oxide emissions would be slightly increased. The research results in this paper can provide important theoretical guidance for micro ignition dual fuel engine and it can be used to optimize fuel injection parameters.

【会议名称】

第28届CIMAC会议

【会议地点】

芬兰 赫尔辛基

【下载次数】

2

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