Simulation study into effect of intake air oxygen concentration on combustion process in diesel engine

Xiao Kang Ma; Fu Jun Zhang; Kai Han; Zhen Yu Zhang

doi:10.3969/j.issn.1000-1093.2014.07.001

Simulation study into effect of intake air oxygen concentration on combustion process in diesel engine

Xiao Kang Ma^*, Fu Jun Zhang, Kai Han, Zhen Yu Zhang

^*Corresponding author for this work

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

In order to investigate the effect of intake air oxygen concentration on the combustion process in diesel engine, computation fluid dynamics (CFD) software FIRE is used to simulate the combustion process in terms of the ratio of oxygen and nitrogen in intake air. The results show that intake air oxygen concentration affects the quality of fuel-air mixture. With the decrease in intake air oxygen concentration, the rich fuel-air mixture increases, which leads to a decrease in heat release rate in the stage of diffusion combustion. The decrease in intake air oxygen concentration reduces the in-cylinder peak pressure and combustion temperature, and the quality of combustion becomes worse. The oxygen-enriched combustion leads to a remarkable increase in NO_x emission and a decrease in soot emission; with a decrease in intake air oxygen concentration at part load, both NO_x and soot emissions decrease.

Original language	English
Pages (from-to)	945-952
Number of pages	8
Journal	Binggong Xuebao/Acta Armamentarii
Volume	35
Issue number	7
DOIs	https://doi.org/10.3969/j.issn.1000-1093.2014.07.001
Publication status	Published - Jul 2014

Keywords

Combustion process
Diesel engine
Emission
Intake air oxygen concentration
Power machinery engineering

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10.3969/j.issn.1000-1093.2014.07.001

Cite this

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title = "Simulation study into effect of intake air oxygen concentration on combustion process in diesel engine",

abstract = "In order to investigate the effect of intake air oxygen concentration on the combustion process in diesel engine, computation fluid dynamics (CFD) software FIRE is used to simulate the combustion process in terms of the ratio of oxygen and nitrogen in intake air. The results show that intake air oxygen concentration affects the quality of fuel-air mixture. With the decrease in intake air oxygen concentration, the rich fuel-air mixture increases, which leads to a decrease in heat release rate in the stage of diffusion combustion. The decrease in intake air oxygen concentration reduces the in-cylinder peak pressure and combustion temperature, and the quality of combustion becomes worse. The oxygen-enriched combustion leads to a remarkable increase in NOx emission and a decrease in soot emission; with a decrease in intake air oxygen concentration at part load, both NOx and soot emissions decrease.",

keywords = "Combustion process, Diesel engine, Emission, Intake air oxygen concentration, Power machinery engineering",

author = "Ma, {Xiao Kang} and Zhang, {Fu Jun} and Kai Han and Zhang, {Zhen Yu}",

year = "2014",

month = jul,

doi = "10.3969/j.issn.1000-1093.2014.07.001",

language = "English",

volume = "35",

pages = "945--952",

journal = "Binggong Xuebao/Acta Armamentarii",

issn = "1000-1093",

publisher = "China Ordnance Society",

number = "7",

}

TY - JOUR

T1 - Simulation study into effect of intake air oxygen concentration on combustion process in diesel engine

AU - Ma, Xiao Kang

AU - Zhang, Fu Jun

AU - Han, Kai

AU - Zhang, Zhen Yu

PY - 2014/7

Y1 - 2014/7

N2 - In order to investigate the effect of intake air oxygen concentration on the combustion process in diesel engine, computation fluid dynamics (CFD) software FIRE is used to simulate the combustion process in terms of the ratio of oxygen and nitrogen in intake air. The results show that intake air oxygen concentration affects the quality of fuel-air mixture. With the decrease in intake air oxygen concentration, the rich fuel-air mixture increases, which leads to a decrease in heat release rate in the stage of diffusion combustion. The decrease in intake air oxygen concentration reduces the in-cylinder peak pressure and combustion temperature, and the quality of combustion becomes worse. The oxygen-enriched combustion leads to a remarkable increase in NOx emission and a decrease in soot emission; with a decrease in intake air oxygen concentration at part load, both NOx and soot emissions decrease.

AB - In order to investigate the effect of intake air oxygen concentration on the combustion process in diesel engine, computation fluid dynamics (CFD) software FIRE is used to simulate the combustion process in terms of the ratio of oxygen and nitrogen in intake air. The results show that intake air oxygen concentration affects the quality of fuel-air mixture. With the decrease in intake air oxygen concentration, the rich fuel-air mixture increases, which leads to a decrease in heat release rate in the stage of diffusion combustion. The decrease in intake air oxygen concentration reduces the in-cylinder peak pressure and combustion temperature, and the quality of combustion becomes worse. The oxygen-enriched combustion leads to a remarkable increase in NOx emission and a decrease in soot emission; with a decrease in intake air oxygen concentration at part load, both NOx and soot emissions decrease.

KW - Combustion process

KW - Diesel engine

KW - Emission

KW - Intake air oxygen concentration

KW - Power machinery engineering

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DO - 10.3969/j.issn.1000-1093.2014.07.001

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SN - 1000-1093

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JO - Binggong Xuebao/Acta Armamentarii

JF - Binggong Xuebao/Acta Armamentarii

IS - 7

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Simulation study into effect of intake air oxygen concentration on combustion process in diesel engine

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