燃空当量比对甲醇发动机燃烧及非法规排放的影响

孙景震; 姚实聪; 宫宝利; 彭幼华; 崔连波; 彭乐高; 宫长明

doi:10.3969/j.issn.1001-2222.2018.05.008

车用发动机 ›› 2018, Vol. 0 ›› Issue (5) : 43-48. DOI: 10.3969/j.issn.1001-2222.2018.05.008

栏目

燃空当量比对甲醇发动机燃烧及非法规排放的影响

孙景震^1,3，姚实聪²，宫宝利²，彭幼华²，崔连波²，彭乐高⁴，宫长明⁵

作者信息 +

Combustion and Non-Legislation Emission of Methanol Engine under Different Fuel-Air Equivalence Ratios

SUN Jingzhen^1,3，YAO Shicong²,GONG Baoli²,PENG Youhua²,CUI Lianbo²,PENG Legao⁴,GONG Changming⁵

Author information +

文章历史 +

摘要

基于一款经柴油机改装的缸内直喷点燃式甲醇发动机，使用三维流体动力学模拟软件AVL-Fire 耦合甲醇氧化反应机理，研究了不同燃空当量比对缸内混合气浓度分布、燃烧特性及未燃甲醇和甲醛排放的影响。结果表明：当燃空当量比增加时，缸内最高燃烧温度、最高燃烧压力及放热率峰值均显著升高，甲醛和未燃甲醇排放均得到改善；当燃空当量比从0.33增加到0.67时，最高燃烧压力、燃烧温度和放热率峰值分别增加65%，72%及51%；燃空比超过0.4时，未燃甲醇及甲醛排放急剧减小，且主要集中在气缸壁附近。

Abstract

The influences of different fuelair equivalence ratios on in-cylinder mixture concentration distribution,combustion characteristics, formaldehyde and unburned methanol were studied on a diesel engine retrofitted in-cylinder injection spark ignition methanol engine by coupling methanol chemical kinetics reaction mechanism with 3D CFD software AVL-Fire. The research results show that the increase of fuelair equivalence ratio can increase maximum incylinder temperature，maximum incylinder pressure and maximum heat release rate significantly and reduce the emission of formaldehyde and unburned methanol obviously. When the fuel-air equivalent ratio increases from 0.33 to 0.67, the maximum combustion pressure, maximum combustion temperature and heat release rate peak increases by 65%, 72% and 51% respectively. When the fuel-air ratio exceeds 0.4, the emission of unburned methanol and formaldehyde decrease sharply and mainly lie near the cylinder wall.

导出引用

孙景震，姚实聪，宫宝利，彭幼华，崔连波，彭乐高，宫长明. 燃空当量比对甲醇发动机燃烧及非法规排放的影响[J]. 车用发动机. 2018, 0(5): 43-48 https://doi.org/10.3969/j.issn.1001-2222.2018.05.008

SUN Jingzhen,YAO Shicong,GONG Baoli,PENG Youhua,CUI Lianbo,PENG Legao,GONG Changming. Combustion and Non-Legislation Emission of Methanol Engine under Different Fuel-Air Equivalence Ratios[J]. Vehicle Engine. 2018, 0(5): 43-48 https://doi.org/10.3969/j.issn.1001-2222.2018.05.008