Combustion behaviors of a direct-injection engine operating on various fractions of natural gas-hydrogen blends

被引：192

作者：

Wang, Jinhua ^{[1
]}

Huang, Zuohua ^{[1
]}

Fang, Yu ^{[1
]}

Liu, Bing ^{[1
]}

Zeng, Ke ^{[1
]}

Miao, Haiyan ^{[1
]}

Jiang, Deming ^{[1
]}

机构：

[1] Xian Jiaotong Univ, Sch Energy & Power Engn, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2007年 / 32卷 / 15期

基金：

中国国家自然科学基金;

关键词：

natural gas; hydrogen; combustion; emissions; direct-injection engine;

D O I：

10.1016/j.ijhydene.2007.03.011

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Combustion behaviors of a direct injection engine operating on various fractions of natural gas-hydrogen blends were investigated. The results showed that the brake effective thermal efficiency increased with the increase of hydrogen fraction at low and medium engine loads and high thermal efficiency was maintained at the high engine load. The phase of the heat release curve advanced with the increase of hydrogen fraction in the blends. The rapid combustion duration decreased and the heat release rate increased with the increase of hydrogen fraction in the blends. This phenomenon was more obviously at the low engine speed, suggesting that the effect of hydrogen addition on the enhancement of burning velocity plays more important role at relatively low cylinder air motion. The maximum mean gas temperature and the maximum rate of pressure rise increased remarkably when the hydrogen volumetric fraction exceeds 20% as the burning velocity increases exponentially with the increase of hydrogen fraction in fuel blends. Exhaust HC and CO2 concentrations decreased with the increase of the hydrogen fraction in fuel blends. Exhaust NO, concentration increased with the increase of hydrogen fraction at high engine load. The study suggested that the optimum hydrogen volumetric fraction in natural gas-hydrogen blends is around 20% to get the compromise in both engine performance and emissions. (c) 2007 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

引用

页码：3555 / 3564

页数：10

共 14 条

[1] Internal combustion engines fueled by natural gas - hydrogen mixtures [J].