Homogeneous Charge Compression Ignition Combustion and Emissions of Methyl Decanoate and n-Butanol in Low-Speed Diesel Engine

被引：0

作者：

Wang S.-Y. ^{[1
]}

Yao L. ^{[2
]}

Zhang J.-D. ^{[1
]}

机构：

[1] College of Marine Engineering, Dalian Maritime University, Dalian

[2] College of Merchant Marine, Shanghai Maritime University, Shanghai

来源：

Tuijin Jishu/Journal of Propulsion Technology | 2020年 / 41卷 / 11期

关键词：

Homogeneous charge compression ignition; Methyl decanoate; N-Butanol; NO[!sub]x[!/sub] emission; Two-stroke low speed diesel engine;

D O I：

10.13675/j.cnki.tjjs.200367

中图分类号：

学科分类号：

摘要：

Nitrogen oxide (NOx) emissions can be reduced by adding a certain proportion of n-butanol (NBA) into alternative fuel methyl decanoate (MD). The combustion reaction mechanism of methyl decanoate and n-butanol was established for two-stroke low-speed marine diesel engine, and the Zeldovich NOx reaction mechanism was added to the combustion reaction mechanism as a sub-mechanism, which constructed a complete combustion reaction mechanism containing methyl decanoate, n-butanol and detailed NOx reaction. Under the condition that the total mole fraction of fuel is certain, fixed the engine speed and excess air coefficient, mixed methyl decanoate and n-butanol in different proportions, and explored the combustion and NOx emission characteristics of methyl decanoate and n-butanol mixed fuel in two-stroke low-speed marine diesel engine with homogeneous charge compression ignition (HCCI) combustion. The results show that the emissions of NOx produced by HCCI combustion of methyl decanoate and n-butanol mixture decrease with the increase of n-butanol blending ratio. The present research indicates when the total mole fraction of fuel remains unchanged, with the increase of n-butanol mixing ratio, the total heating value decrease, leading to the decrease of the exhaust temperature and in-cylinder peak temperature, the formation of NOx is inhibited, the reaction rate of NOx declines and the emission declines. Meanwhile, due to the increase of n-butanol blending ratio, it leads to the C/H ratio of mixed fuel decrease, which can effectively reduce CO2 emissions during combustion. Under the condition of ensuring the engine combustion efficiency, when the mixing ratio of methyl decanoate and n-butanol is 1: 1, the NO and NO2 emissions in two-stroke low-speed marine diesel engine HCCI combustion are the lowest. © 2020, Editorial Department of Journal of Propulsion Technology. All right reserved.

引用

页码：2558 / 2565

页数：7

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