汽油PRF简化化学反应动力学模型的构建研究  

Study on Construction of Reduced Chemical Reaction Kinetic Mechanism of Primary Reference Fuel for Gasoline

作　　者：刘凯敏[1,2] 鄂加强 杨靖[1] 马寅杰[1] 杨汉乾 罗武生 LIU Kaimin;E Jiaqiang;YANG Jing;MA Yinjie;YANG Hanqian;LUO Wusheng(State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha 410082,China;Department of Mechanical and Electrical Engineering,Central South University of Forestry and Technology,Changsha 410004,China)

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙410082 [2]中南林业科技大学机电工程学院,湖南长沙410004

出　　处：《湖南大学学报（自然科学版）》2022年第6期37-44,共8页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(52006058);长沙市自然科学基金项目(Kq2202290)。

摘　　要：利用反应路径分析和敏感性分析方法对异辛烷和正庚烷的详细化学反应动力学模型进行简化,根据“半解耦”思想,以C0~C1的小分子机理作为汽油基础参考燃料(PRF)的“内核”,构建了包含41种组分和131个反应的PRF简化化学反应动力学模型,并通过了基础反应器包括激波管(ST)、一维层流火焰速度(LFS)和射流搅拌器(JSR)的实验数据验证.结果表明,本文构建的PRF简化动力学模型,既能准确预测燃料的滞燃期,又能有效地描述燃料层流火焰速度和关键组分的演变趋势.The detailed chemical reaction kinetics mechanisms of iso-octane and n-heptane were simplified by using the methods of reaction path analysis and sensitivity analysis. With adopting the semi-decoupling methodology,the small molecule mechanism of C0~C1 was used as the core of primary reference fuel(PRF)for gasoline,a new reduced mechanism of PRF which consists of 41 species and 131 reactions was developed,and then the developed mechanism was verified by the experimental data of shock tube(ST),laminar flame speed(LFS)and jet stirred reactor(JSR). The results show that the reduced PRF chemical reaction mechanism developed in this paper can not only accurately predict the ignition delay time,but also effectively describe the laminar flame velocity and the evolution of key species.

关 键 词：化学反应动力学 汽油 基础参考燃料 层流火焰速度 

分 类 号：TK411.2[动力工程及工程热物理—动力机械及工程]