基于反应路径主通道的集总方法在JP-10高温燃烧机理简化中的应用研究  

Application of the lumped method based on main channels of reaction paths in the mechanism reduction for combustion of JP10 at high temperatures

作　　者：刘美玲 闵杰 谈宁馨[1] LIU Mei-ling;MIN Jie;TAN Ning-xin(College of Chemical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学化学工程学院,四川成都610065

出　　处：《化学研究与应用》2021年第10期1982-1990,共9页Chemical Research and Application

基　　金：国家自然科学基金项目(91741201)资助。

摘　　要：为了构建符合化学反应规则的小尺度高密度碳氢燃料JP-10燃烧反应机理,用于发动机燃烧室设计的计算流体力学数值模拟,本研究以Gao C W等用RMG机理自动生成程序构建的JP-10详细燃烧机理为基础,通过DRG和DRGEP方法进行初步简化后,进行全燃烧时段反应路径分析以确定主要反应通道,并对反应路径主通道集总。将包括集总反应的扩展机理和USCMech 2.0核心机理组合,用DRG、DRGEP和FSSA方法对组合的机理进一步简化,得到含73个物种,411步反应的简化机理。该简化机理能在合理的误差范围内再现JP-10的高温燃烧点火延时。该集总方法可以推广到其他高密度多环碳氢燃料机理的简化,结合进一步的物种集总方法,能提供更小尺度的燃烧机理。A detailed combustion mechanism of JP-10,which was built by GaoC W et al.using an automatically mechanism generating program named RMG,was employed to construct a small scale JP-10 combustion mechanism in accordance with the chemical reaction rules,so that the small scale mechanism can be used in the computational fluid dynamics numerical simulation for the combustion chamber of engine design.Firstly,the detailed mechanism was simplified preliminarily by DRG and DRGEP methods.Secondly,the reaction path analysis during the whole combustion period was carried out to determine the main channel of reaction path,and the main channel of the reaction path of the extension mechanism was lumped.And then,the lumped reactions were combined with the USCMech 2.0 core mechanism to form a lumped mechanism.At last,this lumped mechanism was further reduced by DRG,DRGEP and FSSA methods to obtain a simplified mechanism with 73 species and 411 reactions.The simplified mechanism can reproduce ignition delays of JP-10 within a reasonable error range at high temperatures.This lumped method can be extended toreduce the mechanismof other high-density polycyclic hydrocarbon fuels,and can further provide the smaller scale combustion mechanism though combining with lumped species.

关 键 词：高密度碳氢燃料 集总机理 点火延时 

分 类 号：O643.1[理学—物理化学]