Numerical Investigation on Flame Development and Emission Production Mechanism on a Low-Speed Natural Gas/Diesel Dual-Fuel Marine Engine

被引：0

作者：

Ye Y. ^{[1
]}

Wu C. ^{[2
]}

Liu H. ^{[1
]}

Dong J. ^{[2
]}

Li J. ^{[1
]}

Yao M. ^{[1
]}

机构：

[1] State Key Laboratory of Engines, Tianjin University, Tianjin

[2] China Shipbuilding Power Engineering Institute, Shanghai

来源：

Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) | 2022年 / 40卷 / 01期

关键词：

Combustion process; Dual-fuel; Emission production mechanism; Jet flame; Low-speed marine engine;

D O I：

10.16236/j.cnki.nrjxb.202201001

中图分类号：

学科分类号：

摘要：

Based on the computational fluid dynamics platform of CONVERGE and the after-treat program of MATLAB, the combustion process and the jet flame development mechanism were investigated on a two-stroke low-speed natural gas/diesel dual-fuel marine engine with pre-chamber. The production mechanisms of NOx and HC emissions were also researched. The results show that the combustion process can be divided into three major stages. Firstly, the diesel spray near the orifice in the pre-chamber ignites, the flame develops to the unburn region and then the jet flame is generated and passes through the orifice. Secondly, the premixed methane in the main chamber is subsequently ignited by the jet flame in which the premixed combustion of unburn mixture and mid-production from the pre-chamber was observed. Thirdly, flame propagation occurs in the main chamber. In addition, it is found that NOx emissions mainly produce inside the pre-chamber, while HC emissions mainly produce at the flame-wall interaction region and piston-to-wall region, respectively. © 2022, Editorial Office of the Transaction of CSICE. All right reserved.

引用

页码：1 / 9

页数：8

共 20 条

[1] Andre R, Gmb C., Dual-fuel for maritime application international council on combustion engines, Proceedings of the 27th CIMAC World Congress on Combustion Engine Technology, (2013)
[2] Christoforos M, Theotokatos G., Numerical investigation of a premixed combustion large marine two-stroke dual fuel engine for optimising engine settings via parametric runs, Energy Conversion and Management, 160, pp. 48-59, (2018)
[3] 26, (2015)
[4] (2018)
[5] Biswas S, Tanvir S, Wang H, Et al., On ignition mechanisms of premixed CH4/air and H2/air using a hot turbulent jet generated by pre-chamber combustion, Applied Thermal Engineering, 106, pp. 925-937, (2016)
[6] Allison P, DeOliveira M, Giusti A, Et al., Pre-chamber ignition mechanism: Experiments and simulations on turbulent jet flame structure, Fuel, 230, pp. 274-281, (2018)
[7] Xu G, Kotzagianni M, Kyrtatos P, Et al., Experimental and numerical investigations of the unscavenged prechamber combustion in a rapid compression and expansion machine under engine-like conditions, Combustion and Flame, 204, 1, pp. 68-84, (2019)
[8] Chinnathambi P, Bunce M., The effects of pre-chamberinitiated lean-burn combustion on engine efficiency and emissions, (2015)
[9] 39, 1
[10] (2015)

← 1 2 →