摘要
为开发出结构紧凑、高精度和包含多环芳烃(polycyclic aromatic hydrocarbons,PAHs)的高碳燃料模型燃料机理并应用于计算流体力学(computational fluid dynamics,CFD)模拟,提出了一种集成详细的C_(0)—C_(4)核心机理和骨架的C_(5)—Cn机理来发展高碳燃料骨架反应机理的新方法。利用该方法为基础燃料分别为正十六烷(NC_(16)H_(34))、2,6,10-三甲基十二烷(C_(15)H_(32)-26X)和正丁基苯(C_(6)H_(5)C_(4)H_(9))的模型燃料构建相应的骨架反应机理。然后基于机理简化手段获得了包含164个组分和654个基元反应的骨架机理。利用激波管点火延迟时间、流动反应器氧化数据、层流火焰速度和熄火极限等基础燃烧数据对构建的机理进行验证。然后,将该骨架机理耦合到三维CFD喷雾模型中,来模拟定容喷雾燃烧室(constant volume spray combustion chamber,CVSCC)中的喷雾燃烧过程。结果表明喷雾燃烧特性的模拟值能与实验值吻合良好,证明了所构建骨架机理在燃烧CFD模拟中的有效性。
In order to develop a compact,high-precision and polycyclic aromatic hydrocarbons(PAHs)containing high carbon fuel model fuel mechanism and apply it to computational fluid dynamics(CFD)simulation,a new method integrating detailed C_(0)—C_(4)core mechanism and C_(5)—Cn mechanism of the skeleton was proposed to develop the high carbon fuel skeleton reaction mechanism.This method was used to build the corresponding skeleton reaction mechanism for the model fuels whose base fuels were n-neneneba hexadecane(NC_(16)H_(34)),2,6,10-trimethyldodecane(C_(15)H_(32)-26X)and n-butyl benzene(C_(6)H_(5)C_(4)H_(9))respectively.Then,a skeleton mechanism containing 164 species and 654 elementary reactions was obtained based on mechanism simplification methods.The constructed mechanism was validated by fundamental combustion data,including shock tube ignition delay times,flow reactor oxidation data,laminar flame speeds,and extinction limits of the base fuels.Then,the skeleton mechanism was coupled to a three-dimensional CFD spray model to simulate the spray combustion process in a constant volume spray combustion chamber(CVSCC).The results show that the simulation values of spray combustion characteristics can match well with the experimental values,which proves the effectiveness of the framework mechanism in combustion CFD simulation.
作者
禹进
周航
樊崇政
YU Jin;ZHOU Hang;FAN Chongzheng(School of Aeronautics,Chongqing Jiaotong University,Chongqing 400074,China;School of Mechatronics&Automobile Engineering,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《内燃机工程》
CAS
CSCD
北大核心
2024年第1期86-97,共12页
Chinese Internal Combustion Engine Engineering
基金
国家自然科学基金项目(52006020)。
关键词
骨架机理
机理简化
喷雾模型
燃烧特性
数值模拟
skeleton mechanism
mechanism reduction
spray model
combustion characteristic
numerical simulation
作者简介
禹进(1990-),男,副教授,博士,主要研究方向为替代燃料模型,E-mail:yjin123@yeah.net。
