正癸烷预混燃烧的详细反应动力学数值模拟  

Detailed reaction kinetic modeling of n-decane premixed combustion

作　　者：曾文[1] 刘静忱[1] 陈潇潇[1] 解茂昭[2] 

机构地区：[1]沈阳航空航天大学动力与能源工程学院,沈阳110136 [2]大连理工大学能源与动力学院,辽宁大连116024

出　　处：《航空动力学报》2011年第10期2258-2266,共9页Journal of Aerospace Power

基　　金：国家自然科学基金(50906059);中国博士后科学基金(20080430733)

摘　　要：提出了正癸烷预混燃烧的详细化学反应机理,并对正癸烷预混燃烧过程进行了数值计算.同时,详细分析了反应物、主要生成物及多种中间组分摩尔分数的变化趋势,并分别与采用正癸烷与航空煤油为燃料的燃烧火焰的实验结果进行了对比分析.结果表明,正癸烷与航空煤油预混燃烧火焰中反应物与生成物摩尔分数的变化趋势基本一致;通过数值计算所得到的主要反应物与生成物摩尔分数的变化趋势与两种燃料(正癸烷与航空煤油)燃烧火焰的实验值基本吻合,说明该详细反应机理能很好地反映正癸烷预混燃烧过程的详细动力学特性.同时,通过反应流分析发现,正癸烷的消耗主要通过热裂解反应以及H,OH自由基的提取反应来实现.A detailed reaction mechanism for the premixed combustion of n-decane was compiled and the process of n-decane premixed combustion was simulated.The mole fractions of the reactants,the major combustion products and the intermediate species were analyzed.At the same time,the simulation results were compared with the experimental data of the n-decane and kerosene premixed flames,respectively.The results show that the shapes of the profiles of the mole fractions of the reactants and the major combustion products in n-decane flame agree with that in kerosene flame.The simulated profiles of the mole fractions of the reactants and the major combustion products agree with the experimental data of the n-decane and kerosene flames,showing that this detailed reaction mechanism can well reflect the detailed kinetic characteristics of n-decane premixed combustion.Furthermore,through net reaction rate analysis,it＇s found that major paths consuming n-decane are implemented through thermal decomposition and abstraction of H and OH.

关 键 词：正癸烷 预混燃烧 数值模拟 详细化学反应机理 反应流分析 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]