基于Converge的F-T煤制油燃烧与排放特性数值模拟研究

强艳飞; 吴双群; 张磊磊

doi:10.3969/j.issn.1001-2222.2021.03.006

车用发动机 >

2021 , Vol. 0 >Issue 3: 32 - 38

DOI: https://doi.org/10.3969/j.issn.1001-2222.2021.03.006

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基于Converge的F-T煤制油燃烧与排放特性数值模拟研究

强艳飞 ,
吴双群 ,
张磊磊

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（内蒙古工业大学能源与动力工程学院，内蒙古呼和浩特 010000）

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Numerical Simulation of Combustion and Emission Characteristics of F-T Coal-to-Oil Based on Converge

QIANG Yanfei ,
WU Shuangqun ,
ZHANG Leilei

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(College of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010000,China)

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摘要

为了研究煤制柴油对柴油机燃烧排放性能的影响，通过Converge软件对1台1.46 L缸内直喷高压共轨柴油机燃烧F-T煤制油进行仿真试验，并与石化柴油的燃烧过程进行对比。研究结果表明：在柴油机低转速工况下，燃用F-T煤制油有效功率降幅较小，随着转速的升高，有效功率降幅增大；燃用F-T煤制油缸内压力低于燃用普通柴油，开始放热时刻较早，预混阶段喷油量较少使得预混放热峰值较低，在扩散燃烧阶段放热峰值高于普通柴油；燃用F-T煤制油炭烟排放量相比于柴油降低42%，NO_x排放降低31%。

关键词： F-T煤制油; 燃烧过程; 柴油机; 动力性; 排放

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强艳飞 , 吴双群 , 张磊磊 . 基于Converge的F-T煤制油燃烧与排放特性数值模拟研究[J]. 车用发动机, 2021 , 0(3) : 32 -38 . DOI: 10.3969/j.issn.1001-2222.2021.03.006

Abstract

In order to study the influence of coal-to-oil on the combustion and emission performance of diesel engines, the simulation experiment of burning F-T coaltooil was conducted through Converge software on a 1.46 L direct-injection high-pressure common rail diesel engine, and was compared with that of petrochemical diesel. The results show that the effective power drop of F-T coal-to-oil is small at low speed, but increases with the increase of engine speed. The in-cylinder pressure of F-T coal-to-oil is lower than that of ordinary diesel, and the heat release timing of F-T coal-to-oil starts earlier. The peak value of heat release is lower due to the small fuel injection amount in the premix stage, and is higher than that of ordinary diesel in the diffusion combustion stage. Compared with diesel, the soot and NO_x emissions of F-T coal-to-oil reduced by 42% and 31% respectively.

Key words： F-T coal-to-oil; combustion process; diesel engine; power performance; emission

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