适用于HCCI燃烧的汽油替代燃料化学动力学简化模型

doi:10.3866/PKU.WHXB201505131

物理化学学报 >> 2015, Vol. 31 >> Issue (7): 1265-1274.doi: 10.3866/PKU.WHXB201505131

适用于HCCI燃烧的汽油替代燃料化学动力学简化模型

郑朝蕾, 梁振龙

重庆大学低品位能源利用技术及系统教育部重点实验室, 重庆400044

收稿日期:2015-01-13 修回日期:2015-05-13 发布日期:2015-07-08
通讯作者: 郑朝蕾 E-mail:zhengzhaolei@cqu.edu.cn
基金资助:
国家自然科学基金(51376202)和中央高校基本科研基金(CDJZR13145501)资助项目

Reduced Chemical Kinetic Model of a Gasoline Surrogate Fuel for HCCI Combustion

ZHENG Zhao-Lei, LIANG Zhen-Long

Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400044, P. R. China

Received:2015-01-13 Revised:2015-05-13 Published:2015-07-08
Contact: ZHENG Zhao-Lei E-mail:zhengzhaolei@cqu.edu.cn
Supported by:
The project was supported by the National Natural Science Foundation of China (51376202) and Fundamental Research Funds for the Central Universities, China (CDJZR13145501).

摘要/Abstract

摘要：

建立了一个适用于由正庚烷、异辛烷、甲苯和二异丁烯组成的汽油替代燃料均质压燃着火(HCCI)燃烧过程的简化机理模型, 包含103 种组分199 个反应. 二异丁烯主要通过燃料的脱氧反应消耗掉, 生成三种同分异构体, JC₈H₁₅-A、JC₈H₁₅-B和JC₈H₁₅-D; 燃料的分解反应也是二异丁烯的另外一条主要消耗路径, 生成两种重要的C₄产物, TC₄H₉和IC₄H₇. 这些产物是CH₂O的主要来源. 甲苯掺比燃料(TRF)机理主要是基于Andrae 等建立的TRF半详细机理, 甲苯和二异丁烯子机理是通过路径分析和敏感性分析得到. 简化机理能够很好地模拟激波管里的着火延迟和HCCI发动机实验, 由此可知, 本文提出的简化机理用来模拟HCCI燃烧是可靠的.

关键词: 反应机理, 汽油替代, 着火延迟时间, 反应路径, 均质压燃着火

Abstract:

A new reduced chemical kinetic model that includes 103 species and 199 reactions is developed and used to describe the oxidation of a gasoline surrogate fuel consisting of n-heptane, iso-octane, toluene, and diisobutylene (DIB) for homogeneous charge compression ignition (HCCI). DIB is mainly consumed by Habstraction reactions by OH radicals to form three isomers, namely JC₈H₁₅- A, JC₈H₁₅- B, and JC₈H₁₅- D. Decomposition reaction is also one of the main reactions of DIB consumption, and this process forms two important C₄ products, namely TC₄H₉ and IC₄H₇. These products are the primary sources for CH₂O generation. The skeletal mechanism of toluene reference fuel (TRF) is based on the existing semi-detailed TRF mechanism developed by Andrae. The toluene and DIB sub-mechanism is developed using reaction path and sensitivity analyses. Good agreements are achieved with the experimental ignition delays observed in a shock tube and an HCCI engine. The present reduced model has reliable performance for HCCI combustion simulations.

Key words: Reaction mechanism, Gasoline surrogate, Ignition delay time, Reaction path, Homogeneous charge compression ignition

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郑朝蕾, 梁振龙. 适用于HCCI燃烧的汽油替代燃料化学动力学简化模型[J]. 物理化学学报, 2015, 31(7), 1265-1274. doi: 10.3866/PKU.WHXB201505131

ZHENG Zhao-Lei, LIANG Zhen-Long. Reduced Chemical Kinetic Model of a Gasoline Surrogate Fuel for HCCI Combustion[J]. Acta Phys. -Chim. Sin. 2015, 31(7), 1265-1274. doi: 10.3866/PKU.WHXB201505131

链接本文: https://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB201505131

https://www.whxb.pku.edu.cn/CN/Y2015/V31/I7/1265

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适用于HCCI燃烧的汽油替代燃料化学动力学简化模型

Reduced Chemical Kinetic Model of a Gasoline Surrogate Fuel for HCCI Combustion

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