Numerical study of effects of reformed exhaust gas recirculation (REGR) on dimethyl ether HCCI combustion

被引：20
|
作者：
Zheng, Zhaolei [1 ]
Liu, Chuntao [1 ]
Zhang, Xiaoyu [2 ]
机构：
[1] Chongqing Univ, Key Lab Low Grade Energy Utilizat Technol & Syst, Minist Educ, Chongqing 400044, Peoples R China
[2] Chongqing Changan Automobile Co Ltd, Powertrain Engn R&D Ctr, Chongqing 401120, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2014年 / 39卷 / 15期
基金：
中国国家自然科学基金;
关键词：
REGR; DME; HCCI; Combustion; Emissions; DI COMBUSTION; DIESEL-ENGINE; REACTION-KINETICS; EMISSIONS; FUEL; PERFORMANCE; GASOLINE; OXIDATION; POWER; H-2;
D O I：
10.1016/j.ijhydene.2014.03.030
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：
The effects of reformed exhaust gas recirculation (REGR) on combustion and emissions of dimethyl ether (DME) homogeneous charge compression ignition (HCCI) engines are studied by multi-dimensional CFD coupled with chemical kinetic model. The results show that REGR combing EGR and DME reformed gases (DRG) improves combustion and emissions. REGR can delay ignition time by both EGR and DRG, and makes main combustion closer to top dead center (TDC), which is beneficial to reducing compression negative work and broadening load range of HCCI engines. The interaction of DRG and EGR helps avoid too high pressure rise rate or low power performance when being applied independent of each other. HC, CO and NOx emissions can be controlled simultaneously by REGR. Both advantages of DRG and EGR are used to decrease the emissions of HCCI engines by REGR, while the disadvantages of high emissions are alleviated when one of them is applied. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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页码：8106 / 8117
页数：12
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