Numerical Simulation of Chemical Reaction Kinetics in GasolineCompression Ignition Combustion

尚冉; 张帆; 王洋; 夏明涛; 钟生辉; 刘海峰

doi:10.13949/j.cnki.nrjgc.2019.02.006

您当前的位置：

首页 >

文章列表页 >

Numerical Simulation of Chemical Reaction Kinetics in GasolineCompression Ignition Combustion

更新时间：2026-04-16

- Numerical Simulation of Chemical Reaction Kinetics in GasolineCompression Ignition Combustion
- Vol. 40, Issue 2, Pages: 36-44(2019)
- 作者机构：
  
  天津大学内燃机燃烧学国家重点实验室,天津,300072
- 作者简介：
- 基金信息：
- DOI：10.13949/j.cnki.nrjgc.2019.02.006
  CLC：
- Published：2019
- 稿件说明：
移动端阅览
尚冉，张帆，王洋，夏明涛，钟生辉，刘海峰.汽油压燃发动机中燃烧化学动力学特性的模拟[J].内燃机工程,2019,40(2):36-44.

尚冉, 张帆, 王洋, et al. Numerical Simulation of Chemical Reaction Kinetics in GasolineCompression Ignition Combustion[J]. 2019, 40(2): 36-44.
尚冉，张帆，王洋，夏明涛，钟生辉，刘海峰.汽油压燃发动机中燃烧化学动力学特性的模拟[J].内燃机工程,2019,40(2):36-44. DOI： 10.13949/j.cnki.nrjgc.2019.02.006.

尚冉, 张帆, 王洋, et al. Numerical Simulation of Chemical Reaction Kinetics in GasolineCompression Ignition Combustion[J]. 2019, 40(2): 36-44. DOI： 10.13949/j.cnki.nrjgc.2019.02.006.

摘要

利用PRF70掺混燃料作为汽油表征燃料进行仿真研究，将三维计算软件CONVERGE和Chemkin结合，研究了汽油压燃燃烧反应过程的主要放热反应并对其进行了相关的化学反应路径分析。结果表明：在汽油压燃燃烧反应过程中，不同反应对总放热率的贡献不同，由HCO+O2 ↔ CO+HO2、CH2O+OH ↔ HCO+H2O、CH2CCH2OH+O2 ↔ CH2OH+CO+CH2O是燃料燃烧过程中对放热贡献最大的3个反应，其放出的热量远大于其他反应；汽油压燃燃烧反应过程中参与夺氢反应的自由基主要有4种，分别是HO2、OH、H、O，在不同曲轴转角处上述4种自由基参与夺氢反应的重要性不同，HO2夺氢反应所占比例始终领先其他3种，H、O参与的夺氢反应所占比例随曲轴转角的增加而增加

相应的OH参与夺氢反应所占比例减少；汽油压燃燃烧反应过程中，随着曲轴转角的变化，缸内温度升高，异辛烷发生高温裂解的比例增加。

Abstract

The main exothermic reactions in gasoline compression ignition(GCI) combustion were studied and the important elementary reaction paths were analyzed by adopting PRF70 blended fuel as indicated gasoline fuel and by combining the CONVERGE

a three-dimensional calculation software

and the Chemkin

a zero-dimensional calculation software. The results show that different reactions in the GCI combustion contribute differently to the total heat release rate. HCO+O2 ↔ CO+HO2

CH2O+OH ↔ HCO+H2O and CH2CCH2OH+O2 ↔ CH2OH+CO+CH2O are the three main reactions contributing most to heat release rate compared with other reactions. The four radicals HO2

H and O are involved in hydrogen(H) abstracting reaction. The H abstracting reaction by HO2 dominates in the GCI combustion

the H abstracting reactions by H and O increase with the crank angle

while the H abstracting reaction by OH decreases with the increase of crank angle. With the advance of the combustion

the temperature in cylinder goes up

and iso-octane cracking at high temperature increases.

关键词

Keywords

references

Views

906

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

No data

Related Author

No data

Related Institution

No data

AI问答

⁰