摘要
针对新型低温催化惰化系统中反应器存在的易飞温和转化率低的问题,基于FLUENT多孔介质模型,以用户自定义标量(UDS)添加固相能量方程,以用户自定义函数(UDF)形式加入化学反应,建立了圆柱体、圆锥体及反圆锥体3种结构的反应器仿真模型,并通过自建试验台对模型的正确性进行了验证。定义了转化率和耗氧速率2个性能指标,研究了反应器进口气体温度、进口流量和RP-3燃油蒸气体积浓度对反应器性能的影响,分析了反应器的操作范围,并从流动速度的角度出发,比较了3种结构反应器的性能差异。结果表明:进口气体的温度及RP-3燃油体积浓度的提高以及进口流量的减小可以促进反应的发生;反应器的起燃温度为470 K;在相同条件下,3种结构反应器的转化率从高到低依次为圆锥体、圆柱体、反圆锥体,可操作温度范围差值为8~10 K。
To solve the problems of thermal runaway and low conversion rate in the reactor of the novel low-temperature catalytic inerting system,based on the FLUENT porous media model,the solid-phase energy equation was added by UDS,and the chemical reaction was added by UDF,simulation models were developed for cylindrical,conical,and reverse conical reactor structures and their accuracy verified using a self-built experimental platform.Two performance indicators,the conversion rate and oxygen consumption rate were defined.The effects of the inlet gas temperature,inlet flow,and RP-3 fuel vapor concentration on the performance of the reactor were studied,the operating range of the reactor was analyzed,and the performance differences of the three structures were compared in terms of flow velocity.The results show that an increase in the temperature of the inlet gas and the volume concentration of RP-3 fuel,along with a decrease in the inlet flow rate,can promote the occurrence of the reaction.The ignition temperature of the reactor is 470 K.Under identical conditions,the conversion rates of the three types of reactors follow a descending order:conical,cylindrical,and anti-conical,with a differ⁃ence in operating temperature range of 8-10 K.
作者
张小波
白文涛
周文俊
任童
彭孝天
冯诗愚
ZHANG Xiao-bo;BAI Wen-tao;ZHOU Wen-jun;REN Tong;PENG Xiao-tian;FENG Shi-yu(AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems,Nanjing 210016,China;College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China)
出处
《航空发动机》
北大核心
2024年第4期75-81,共7页
Aeroengine
基金
国家自然科学基金委员会-中国民用航空局民航联合研究基金(U1933121)资助。
关键词
反应器
催化惰化
RP-3燃油
转化率
耗氧速率
reactor
catalytic inerting
RP-3 fuel
conversion rate
oxygen consumption rate
