Numerical Investigation on Combustion Process of OPOC TwoStroke Diesel Engine in Plateau Environment

ZHANG Lei; SU Tiexiong; FENG Yunpeng; MA Fukang; ZHANG Yangang; CAO Siqi

doi:10.3969/j.issn.1001-2222.2019.01.010

Vehicle Engine ›› 2019, Vol. 0 ›› Issue (1) : 58-63. DOI: 10.3969/j.issn.1001-2222.2019.01.010

Numerical Investigation on Combustion Process of OPOC TwoStroke Diesel Engine in Plateau Environment

ZHANG Lei¹,SU Tiexiong^1,2,FENG Yunpeng³，MA Fukang²,ZHANG Yangang²，CAO Siqi⁴

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Abstract

In order to study the influences of plateau environment on the performance of OPOC twostroke diesel engine, the combustion processes of OPOC engine at different altitudes were investigated with 3D simulation method. The influences of plateau environment on the airfuel mixing process inside the cylinder of OPOC two-stroke diesel engine were quantitatively analyzed according to the mixture characteristic parameters. Through the analysis of combustion characteristic parameters, the influences of plateau environment on the combustion process and performance of OPOC two-stroke diesel engine were studied. The results show that the mean in-cylinder pressure decreases, the mean in-cylinder temperature increases, the combustion process deteriorates, the fuel consumption and soot emission increase and the NO_x emission shows an unobvious decrease in plateau environment.

Key words

opposedpiston and opposed-cylinder (OPOC) diesel engine / two-stroke diesel engine；plateau environment / mixture formation / combustion process / numerical simulation

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ZHANG Lei,SU Tiexiong,FENG Yunpeng，MA Fukang,ZHANG Yangang，CAO Siqi. Numerical Investigation on Combustion Process of OPOC TwoStroke Diesel Engine in Plateau Environment[J]. Vehicle Engine. 2019, 0(1): 58-63 https://doi.org/10.3969/j.issn.1001-2222.2019.01.010