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

Abstract

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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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.

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

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