Study On Combustion Process And GHG Emission In The Cylinder Of Diesel Engine

With the negotiation of the United Nations Framework Convention on Climate Change(UNFCCC) getting further in testified, more and more concern has been drawn on the role of greenhouse gas(GHG) emissions. In order to reduce the emissions, most countries and departments have now attended to the job of energy saving and emission reduction. There is no exception in ocean shipping industry which undertake the largest freight turnover volume. A series of measures to reducing shipping GHG emission has been unveiled by International Maritime Organization, which contains upgrade main engine, improve hull and superstructure, use low-carbon fuels and voyage optimization etc.The effect introduced by upgrading main engine has been discussed in the paper. KIVA-3V is applied in the numerical simulation of the study for the 6135-type diesel engine. With the input of IPREP and ITAPE5, KIVA making a perfectly grid and output a lot of data such as average pressure, average temperature, temperature field and GHG emission etc. Then TECPLOT360 and Origin8.0 was used to make output data visualized and acquire numbers of performance curves and figures. And then analysis the affection of the different geometric parameters to engine performance and GHG emissions, which evaluate the inject times, the engine speed, the load and the offset of comustion chamber.Through the analysis of results, the result is acquired. With the fuel inject time and engine speed increased, CO2 emission is increased, at the same time, with the load is increased, CO2 emission is decreased, In addition, CO2 emission is increased and then decreased when x offset of combustion chamber is increased. The results show that the model has been built based on KIVA can correctly reflect on diesel engine combustion and GHG emission in the cylinder, and provide guidance to researching the combustion and emission of the diesel engine.