中国汽油的基础燃烧特性和化学反应动力学机理研究

本项目以中国国V汽油为研究对象，利用色谱仪和质谱仪测量汽油的主要组分及其含量，对不同标号的汽油进行组分特性分析。利用高压燃烧弹、高压激波管和快速压缩装置实验平台测量国V汽油在发动机工作条件下的层流燃烧速率和着火延迟期等宏观燃烧参数，利用流动管反应器测量国V汽油热解过程中的物种浓度等微观燃烧参数。同时基于中国汽油烯烃含量高的特点，开展国V汽油替代物关键组分——烯烃宏观和微观燃烧参数的实验测量，结合量子化学计算，构建和优化烯烃的化学反应动力学模型。基于实验数据和汽油替代物组分的化学反应动力学模型，构建汽油多组分替代物的详细化学反应动力学模型和简化模型。本项目实验测量、理论计算和数值模拟相结合，填补了国V汽油宏观和微观燃烧参数的空白，构建了国V汽油多组分替代物的化学反应动力学模型。研究工作为高效低污染汽油机的设计开发和国VI汽油标准的制定提供基础数据和理论支撑。

Different types of national V standard gasoline from different commercial companies are selected as the objective fuels in this project. The main components and their mole fractions of national V standard gasoline will be measured and analyzed by using the gas chromatograph and mass spectrometer. The laminar flame speeds and ignition delay times of the national V standard gasoline will be measured by using the high pressure combustion bomb, the high pressure shock tube and the rapid compression machine at engine-relevant conditions. The mole fractions of pyrolysis products will be measured in a flow reactor combined with gas chromatograph and mass spectrometer. Meanwhile, the ignition delay times, laminar flame speeds and mole fractions of pyrolysis products of the olefins will be measured, and the chemical kinetic model of the olefins will be modified and optimized on the basis of the measurements and the quantum chemical calculations. Based on the experimental data and the chemical kinetic models of the key components of the gasoline surrogates, the detailed chemical kinetics models of multi-component surrogates of national V gasoline and skeletal kinetic models suitable for CFD simulations will be developed. Through the experimental measurement, theoretical calculation and numerical simulation, this research will provide the macroscopic and microscopic combustion parameters, such as ignition delay time, laminar flame speed and mole fractions of pyrolysis products of national V standard gasoline, build the chemical kinetic models suitable for the national V standard gasoline of China. This research will provide the basic data and theoretical support for the realization of high efficiency and low pollution combustion of gasoline engine and the design of national VI gasoline standard.