Numerical Simulation of Combustion Process on a Diesel/Natural Gas Dual Fuel Engine

被引：0

作者：

Zhang N. ^{[1
]}

Liu J. ^{[1
]}

Wang J. ^{[1
]}

机构：

[1] Key Laboratory of New Energy Vehicle Powertrain Technology, Beijing Jiaotong University, Beijing

来源：

Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) | 2018年 / 36卷 / 06期

关键词：

Dual fuel injection model; Emissions; High pressure direct injection engine; Natural gas;

D O I：

10.16236/j.cnki.nrjxb.201806064

中图分类号：

学科分类号：

摘要：

The analysis of combustion and emission characteristics of a high pressure direct injection(HPDI) engine with different exhaust gas recirculation(EGR)rate were performed with an introduction of the diesel/natural gas dual fuel injection model into a multi-dimensional simulation code. The results reveal that the high temperature regions are mainly formed by the combustion of the gas jet combined with an ignition generated by the pilot diesel fuel. Moreover, the high temperature region is split into two parts due to the impingement of the gas jet to the piston bowl edge.One part enters into the piston bowl and forms a clockwise-rotating vortex.The other part enters the squish area to further mix with the fresh air over there. The NO formation regions are similar to that of the high temperature region, especially along the centerline of the gas jet.CO emissions are mainly generated in the squish area due to the lower oxidation rate and insufficient time available.In addition, the particulate matter(PM)emission regions from the HPDI engine are similar to that of the CO emission region due to the low oxidation rate of the soot. With the increase of the EGR rate, NO emission decreases, but CO and PM emissions increase. © 2018, Editorial Office of the Transaction of CSICE. All right reserved.

引用

页码：499 / 506

页数：7

共 20 条

[1]

Liu H.F., Wang X., Zheng Z.Q., Et al., Experimental and simulation investigation of the combustion characteristics and emissions using n-butanol/biodiesel dual-fuel injection on a diesel engine, Energy, 74, pp. 741-752, (2014)

[2]

Li M.H., Zhang Q., Li G.X., Et al., Experimental investigation on performance and heat release analysis of a pilot ignited direct injection natural gas engine, Energy, 90, pp. 1251-1260, (2015)

[3]

Asimov U., Okuno M., Tsuboi K., Et al., Multidimensional CFD simulation of syngas combustion in a micro pilot-ignited dual-fuel engine using a constructed chemical kinetics mechanism, International Journal of Hydrogen Energy, 36, 21, pp. 793-807, (2011)

[4]

Wang Z.S., Zhao Z.X., Wang D., Et al., Impact of pilot diesel ignition mode on combustion and emissions characteristics of a diesel/natural gas dual fuel heavy-duty engine, Fuel, 167, pp. 248-256, (2016)

[5]

Song H.P., Liu C.P., Li F.B., Et al., A comparative study of using diesel and PODE <sub>n</sub> as pilot fuels for natural gas dual-fuel combustion , Fuel, 188, pp. 418-426, (2017)

[6]

Cheenkachorn K., Poompipatpong C., Ho C.G., Performance and emissions of a heavy-duty diesel engine fueled with diesel and LNG(liquid natural gas), Energy, 53, pp. 52-57, (2013)

[7]

Papagiannakis R.G., Kotsiopoulos P.N., Zannis T.C., Et al., Theoretical study of the effects of engine parameters on performance and emissions of a pilot ignited natural gas diesel engine, Energy, 35, pp. 1129-1138, (2010)

[8]

Zhang Q., Li M.H., Shao S.D., Combustion process and emissions of a heavy-duty engine fueled with directly injected natural gas and pilot diesel, Applied Energy, 157, pp. 217-228, (2015)

[9]

Baratta M., Rapetto N., Fluid-dynamic and numerical aspects in the simulation of direct CNG injection in spark-ignition engines, Computers & Fluids, 103, pp. 215-233, (2014)

[10]

Choi M., Song J., Park S., Modeling of the fuel injection and combustion process in a CNG direct injection engine, Fuel, 179, pp. 168-178, (2016)

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