The flame structure and combustion dynamics in micro-mixing combustion of hydrogen-rich syngas with air

Dengke Chen, Penghua Qiu, Chang Liu, Wentong Wang, Rui Sun, Yijun Zhao, Linyao Zhang, Chang Xing and Li Liu

Energy, 2025, vol. 326, issue C

Abstract: Micro-mixing (MM) combustion technology demonstrates remarkable NOx reduction capability in gas turbines. As for hydrogen-rich syngas with typical heating value, the experimental studies are carried out at different equivalence ratio (φ) of 0.380, 0.403, 0.426, 0.450, 0.474 and 0.499 and different nozzle outlet mixture velocity (v) of 32, 43, 54,64 and 75 m/s. An in-depth discussions on flame structure, combustion dynamics, and pollutant emissions is conducted. The result shows that in the operation range, no flashback or combustion oscillation occurred in actual experiments of the combined MM nozzles. With the increase of φ or decrease of v, the overall OH signal intensity and the anchoring ability of the flames become stronger, the heat release rate and temperature distribution uniformity would be enhanced, the degree of flame fluctuation decreases. NO emission increases rapidly with the increase of φ, which is consistent with the generation characteristics of thermal type NO, but under test conditions, they are not higher than 15 μL/L at 15 %O2. The increase of v is beneficial for reducing NO emission, attributed to the shortened residence time of gas.

Keywords: Micro-mixing combustion technology; Combined nozzles; OH signal; Flame fluctuation; NO emission (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544225019243
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:326:y:2025:i:c:s0360544225019243

DOI: 10.1016/j.energy.2025.136282

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().