Flame-flame interactions in lean premixed hydrogen-enriched ammonia-air flames at varying pressures

IF 5.2 2区工程技术 Q2 ENERGY & FUELS

Proceedings of the Combustion Institute Pub Date : 2025-01-01 DOI:10.1016/j.proci.2025.105806

Shrey Trivedi , Martin Rieth , Hassan F. Ahmed , Jacqueline H. Chen , R. Stewart Cant

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Abstract

Flame-flame interaction statistics are analyzed using a Direct Numerical Simulation (DNS) dataset for highly turbulent premixed flames in a temporally-evolving shear layer configuration at pressures of 1 atm and 10 atm. The fuel is a blend of ammonia, hydrogen and nitrogen, and the oxidizer is air. The critical point method is used to identify the different types of flame surface topology. Results are obtained for two different and widely-separated instants of time during the development of the flame. These two times correspond to instants with strong flame interaction with sheared turbulence and after the onset of cellular instability. The statistics indicate that there is a change in the distribution of flame-flame interaction events within the flame brush between the two different times. More events occur towards the trailing edge of the flame at the later time, and there is also a change in the type of topology observed. The changes are found to be stronger for the higher pressure case.

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贫富氢氨-空气预混火焰在不同压力下的火焰-火焰相互作用

利用直接数值模拟（DNS）数据集，分析了1 atm和10 atm压力下高湍流预混火焰在时间演化剪切层配置下的火焰-火焰相互作用统计。燃料是氨、氢和氮的混合物，氧化剂是空气。采用临界点法识别不同类型的火焰表面拓扑结构。在火焰的发展过程中，得到了两个不同的、间隔很宽的时间瞬间的结果。这两个时间对应于与剪切湍流强烈火焰相互作用的瞬间和细胞不稳定开始后的瞬间。统计结果表明，在两个不同的时间内，火焰刷内火焰-火焰相互作用事件的分布发生了变化。在较晚的时间里，更多的事件发生在火焰的后缘，并且观察到的拓扑类型也发生了变化。发现高压情况下的变化更强。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings of the Combustion Institute 工程技术-工程：化工

CiteScore

7.00

自引率

0.00%

发文量

420

审稿时长

3.0 months

期刊介绍： The Proceedings of the Combustion Institute contains forefront contributions in fundamentals and applications of combustion science. For more than 50 years, the Combustion Institute has served as the peak international society for dissemination of scientific and technical research in the combustion field. In addition to author submissions, the Proceedings of the Combustion Institute includes the Institute''s prestigious invited strategic and topical reviews that represent indispensable resources for emergent research in the field. All papers are subjected to rigorous peer review. Research papers and invited topical reviews; Reaction Kinetics; Soot, PAH, and other large molecules; Diagnostics; Laminar Flames; Turbulent Flames; Heterogeneous Combustion; Spray and Droplet Combustion; Detonations, Explosions & Supersonic Combustion; Fire Research; Stationary Combustion Systems; IC Engine and Gas Turbine Combustion; New Technology Concepts The electronic version of Proceedings of the Combustion Institute contains supplemental material such as reaction mechanisms, illustrating movies, and other data.