Математическое моделирование образования и выгорания сажи в цилиндре дизеля 2Ч 10,5/12,0 при работе на рапсовом масле и этаноле

Математическое моделирование образования и выгорания сажи в цилиндре дизеля…

Инженерный журнал: наука и инновации

# 8·2017 17

Mathematical modeling of soot generation

and burnout in a 2Ch 10,5/12,0 diesel cylinder

operating on rapeseed oil and ethanol

Vyatka State Agricultural Academy, Kirov, 610017, Russia

We consider one of the promising methods of decreasing diesel exhaust gas opacity,

namely using alternative fuels, employing which makes it possible to replace petroleum

fuel. We present a mathematical model for soot generation in a diesel cylinder during

rapeseed oil and ethanol combustion. The model is based on the chemical kinetics for

pyrolysis of fuel hydrocarbons and a high-temperature acetylene mechanism. We suggest

a soot generation chemism for diesels operating on rapeseed oil and ethanol, based on

contemporary understanding of the soot particle precursor formation mechanism in die-

sel combustion chambers. Calculation results for the exhaust gas opacity level of the 2Ch

10,5/12,0 diesel using rapeseed oil and ethanol show that while operating on alternative

fuels under nominal conditions, soot concentration in exhaust gases decreases by 3.7

times as compared to using diesel fuel. The results of theoretical computations obtained

are in satisfactory agreement with the experimental data.

Keywords:

diesel, rapeseed oil, ethanol, combustion chamber, pyrolysis, dual fuel supply

system, soot, exhaust gas opacity

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