Abstract A computational simulation of counterflow nonpremixed flame was performed to study the effects of hydrogen enrichment on NO chemistry on the basis of the methodology of fabricating hydrogen enrichment. Normal hydrogen and the fictitious hydrogen enrichment with weakened transport properties were both introduced into flame modeling and the comparative analysis was implemented to explore the coupling effects of the physical transport and reactivity of hydrogen enrichment on NO production. The study focused on the variations in NO peak concentration and the total production rate of NO versus hydrogen enrichment rate. The contributions and sensitivities of key reactions to NO production were estimated to determine the influencing routes of hydrogen enrichment on NO chemistry. The flame structures were compared in terms of the convection, conduction, diffusion and reaction in flame energy and hydrogen species conservations. The coupling interaction between hydrogen diffusion and the reaction promotion caused by hydrogen diffusion is the dominant kinetic incentive of hydrogen enrichment on NO production in nonpremixed methane/air flames.

中文翻译：

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层流非预混甲烷/空气火焰中氢传输和反应性对 NO 生成的耦合效应

摘要 在富氢制备方法的基础上，对逆流非预混火焰进行了计算模拟，研究了富氢对NO化学的影响。将普通氢和输运特性减弱的假想氢富集引入火焰建模并进行对比分析，探讨富氢物理输运和反应性对NO生成的耦合效应。该研究侧重于 NO 峰值浓度的变化以及 NO 的总产率与富氢率的关系。估计关键反应对 NO 产生的贡献和敏感性，以确定富氢对 NO 化学的影响途径。根据对流比较火焰结构，火焰能量和氢物种守恒中的传导、扩散和反应。氢扩散与氢扩散引起的反应促进之间的耦合相互作用是非预混甲烷/空气火焰中富氢对 NO 生成的主要动力激励。