发表机构
Sunchon National University; The University of Sydney（顺天国立大学; 悉尼大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究对比了CH4与16%裂解氨替代燃料CR16在逆流预混火焰中的稀燃熄灭行为，发现CR16具有更高的熄灭应变率和抗吹熄能力，并揭示了其通过氢氧化与含氮反应路径维持燃烧的化学机制，为低裂解率氨燃料的应用提供了理论依据。
AI 中文摘要
本研究比较了CH4和一种16%裂解氨替代燃料CR16在逆流预混火焰中的稀燃熄灭行为。实验与使用OPPDIF的一维模拟同步进行；GRI-Mech 3.0和UCSD机理分别应用于CH4和CR16。在稀燃条件下，CR16表现出比CH4更高的熄灭应变率和抗应变诱导吹熄（RSIB）能力。在Phi=0.66时，尽管两种火焰具有相同的熄灭应变率，但CR16因其更长的火焰时间而显示出更高的RSIB。在其熄灭附近，CR16通过火焰间区域向滞止面维持了H2消耗、自由基反应和放热。氢氧化与含氮路径（包括NH2+NO和HNO反应）耦合，支持了这一行为。这些结果阐明了经济上有利的低裂解率氨燃料具有优异抗熄灭性的化学基础。
英文摘要
In this study, the lean extinction behaviors of CH4 and a 16% cracked ammonia surrogate fuel, CR16, in counterflow premixed flames were compared. Experiments were conducted along with one-dimensional simulations using OPPDIF; the GRI-Mech 3.0 and UCSD mechanisms were applied to CH4 and CR16, respectively. CR16 exhibited higher extinction strain rates and resilience to strain-induced blow-out (RSIB) than those of CH4 under lean conditions. At Phi = 0.66, although both flames had the same extinction strain rate, CR16 showed a higher RSIB because of its longer flame time. Near its extinction, CR16 sustained H2 consumption, radical reactions, and heat release through the interflame region toward the stagnation plane. Hydrogen oxidation coupled with nitrogen-related pathways, including NH2 + NO and HNO reactions, supported this behavior. These results clarify the chemical basis for the superior extinction resistance of economically favorable low-cracking-ratio ammonia fuel.
