Experimental determination of the laminar burning velocity of hydrogen-methane-oxygen flames through a micro-cone burner

Hasche A, Bräuer P, Bauer F, Will S, Eckart S (2027)

Publication Type: Journal article

Publication year: 2027

Journal

Fuel Elsevier

Book Volume: 428

Article Number: 140366

DOI: 10.1016/j.fuel.2026.140366

Abstract

The phenomenon of climate change, together with the associated measures to reduce CO2 emissions, is currently the focus of a great many research topics. Nevertheless, the transition to renewable fuels such as hydrogen can result in elevated combustion temperatures, consequently leading to increased NOx emissions. To counteract these emissions, pure oxygen can be used as an oxidizer instead of conventional air. However, hydrogen–oxygen flames, especially in premixed laminar operation, have not been investigated in detail very often and experimental data is sparce. In order to simulate the process of methane/hydrogen–oxygen combustion, experimental data is required to validate existing mechanisms. A gap exists in the experimental data with respect to validation variables, particularly, in the area of laminar burning velocity (LBV). Therefore, the experimental determination of the LBV of hydrogen–oxygen and various methane-/hydrogen–oxygen mixtures was the focus of this work, which could be favourably realised by a new designed micro-cone burner. A premixed micro-cone burner was developed for oxygen-hydrogen operation. The oxyfuel-flames were recorded by using different optical methods and the methods were compared to determine their suitability for flame detection. Finally, a high-resolution camera equipped with high-magnification optics was used in the UV-wavelength range. A MATLAB routine was used to determine the flame angle and thus the laminar burning velocity. The LBVs of methane-oxyfuel flames with different hydrogen contents from 0 to 100 vol% hydrogen was analysed. Additionally, the equivalence ratio was varied between φ=0.6–1.4, in 0.1 steps for the first time. The LBV was determined using various reaction mechanisms in comparison with the experimental results. It could be shown that the point of the maximum burning velocity shifts to rich conditions in the case of higher hydrogen ratios. Furthermore, it was shown that increasing the hydrogen content raises the LBV in a non-linear manner, and this trend could be reproduced by several mechanisms.

Authors with CRIS profile

Phillipp Bräuer Lehrstuhl für Technische Thermodynamik (LTT) Florian Bauer Lehrstuhl für Technische Thermodynamik (LTT) Stefan Will Lehrstuhl für Technische Thermodynamik (LTT)

Involved external institutions

Technische Universität Bergakademie Freiberg DE Germany (DE)

How to cite

APA:

Hasche, A., Bräuer, P., Bauer, F., Will, S., & Eckart, S. (2027). Experimental determination of the laminar burning velocity of hydrogen-methane-oxygen flames through a micro-cone burner. Fuel, 428. https://doi.org/10.1016/j.fuel.2026.140366

MLA:

Hasche, Anna, et al. "Experimental determination of the laminar burning velocity of hydrogen-methane-oxygen flames through a micro-cone burner." Fuel 428 (2027).

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