氨气掺混乙烯层流燃烧速度测量及动力学分析

Measurement and Kinetic Analysis on Laminar Burning Velocities of Ammonia/Ethylene/Air Flames

本文利用定容燃烧弹测量了不同掺混比(0-1)下NH_(3)/C_(2)H_(4)/air火焰的层流燃烧速度。对NH3/air、C_(2)H_(4)/air层流燃烧速度进行验证,并利用Konnov Mech(2021)及GRI 3.0模型对NH_(3)/C_(2)H_(4)/air火焰层流燃烧速度进行数值计算和动力学分析,其中Konnov机理表现出不错的性能。结果表明,C2H4的添加提高了层流燃烧速度,同时,NH_(3)和C_(2)H_(4)掺混,拓展了反应路径,通过一系列组分NO、CH_(3)等来交互加快反应。最后,通过分析活性自由基H、O、OH的浓度,探究了不同机理在预测层流燃烧速度产生差异的原因。

The laminar burning velocities of NH_(3)/C_(2)H_(4)/air flames at different doping ratios(0-1)were measured using a constant volume combustion chamber.The laminar burning velocities of NH 3/air and C_(2)H_(4)/air were verified,and numerical calculations and kinetic analysis of the laminar burning velocities of NH_(3)/C_(2)H_(4)/air flames were carried out using Konnov Mech(2021)and GRI 3.0 models,in which the Konnov mechanism showed good performance.As the results show,laminar burning velocities were increased due to the addition of C_(2)H_(4).At the same time,NH 3 and C_(2)H_(4) were blended to broaden the reaction pathways and accelerate the reaction by a series of components NO,CH 3,etc.interactively.Meanwhile,the concentrations of H,O and OH radicals were analyzed to investigate the reasons for the differences in the predicted laminar burning velocities among different mechanisms.