期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 46, 页码 23906-23915出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.04.157
关键词
Mesoscale burner array; Swirl stabilized flame; Hydrogen addition; OH* chemiluminescence; OH Planar laser induced; fluorescence
资金
- Office of Naval Research through ONR [N000141712538]
- National Research Foundation of Korea - Korea government (MSIT) [NRF2020R1A2C1102990]
- U.S. Department of Defense (DOD) [N000141712538] Funding Source: U.S. Department of Defense (DOD)
This study investigates the effects of adding hydrogen in a compact mesoscale burner array on flame stability and operating capabilities, demonstrating that hydrogen enhancement can improve flame stability and enhance the operating capabilities of combustion systems.
This manuscript presents a study of hydrogen-enhanced methane flames in a compact mesoscale burner array, where even a minute addition of hydrogen can significantly improve flame stability with reduced combustion length scale thereby enabling volumetric flexibility in small-scale combustion systems. The effect of hydrogen enhancement is demonstrated through combustion reaction length scale and operation limit analysis using methane fuel. The added hydrogen lowered lean blow off equivalence ratios, increased flame temperatures, and shorten the flame length scale, ultimately producing a denser flame array. 10 kHz OH* chemiluminescence and OH planar laser induced fluorescence imaging techniques were used to estimate heat release rate and visualize flame structures. Hydrogen addition increased the OH intensity and decreased global heat release rate fluctuation, and also showed more stable operation under acoustic perturbations. Hydrogen enhancement can be a promising solution for reducing geometric constraints and improving operating capabilities for compact propulsion and power generation systems. (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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