Improved skeletal reduction on multiple gasoline-ethanol surrogates using a Jacobian-aided DRGEP approach under gasoline compression ignition (GCI) engine conditions

被引：15

作者：

Chen, Yulin ^{[1
]}

Mehl, Marco ^{[2
]}

Xie, Yongliang ^{[3
]}

Chen, Jyh-Yuan ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA

[2] Lawrence Livermore Natl Lab, Chem Sci Div, Livermore, CA 94550 USA

[3] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China

来源：

FUEL | 2017年 / 210卷

基金：

美国国家科学基金会;

关键词：

Gasoline surrogate; Ethanol; Chemical mechanism; Reduction; CI; Engine; PARTIAL FUEL STRATIFICATION; MECHANISM REDUCTION; OCTANE NUMBERS; REDUCED MECHANISM; HCCI ENGINES; ALGORITHMS; CHEMISTRY;

D O I：

10.1016/j.fuel.2017.08.085

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

As an octane enhancer in commercial gasoline, ethanol is widely used by its oxygenated and renewable natures. In this study, five gasoline-ethanol blended fuels are studied with anti-knock index of 87-92: (1) Haltermann CARB LEV III E10 gasoline, (2) FACE C gasoline with 7% ethanol (by vol), (3) FACE C with 14% ethanol (by vol), (4) FACE J with 23% ethanol (by vol), (5) FACE J with 36% ethanol (by vol). First, surrogate models are formulated for the five fuels. By conducting a Jacobian-aided directed relation graph with error propagation (DRGEP) approach, a much improved performance is shown over the original counterpart for the multiple heavy fuel surrogate mechanism reduction. Based on the analysis, skeletal mechanisms generated after a hump region with an acceptable error in graph-based approaches is shown to deteriorate the further reduction potential. Starting from a detailed 1134-species mechanism, a 130-species skeletal mechanism and an 80-species reduced mechanism are finally developed with high fidelity under gasoline compression ignition (GCI) engine conditions, combining the DRGEP, target search algorithm (TSA) and quasi-steady state assumption (QSSA) approaches. Additionally, the low temperature heat releases in homogeneous charge compression ignition (HCCI) engine are validated under wide ranges of intake temperatures and pressures.

引用

页码：617 / 624

页数：8

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