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Experimental and numerical investigations of the laminar burning velocities of premixed fuel-rich methane oxy-fuel and oxygen-enhanced flames

Weis, Christof ORCID iD icon 1; Martin Sentko, Matthias 1; Stelzner, Björn 1; Habisreuther, Peter ORCID iD icon 1; Zarzalis, Nikolaos 1; Trimis, Dimosthenis 1
1 Engler-Bunte-Institut (EBI), Karlsruher Institut für Technologie (KIT)

Abstract:

n the context of Oxy-fuel combustion, there is a strong industrial interest in highly fuel-rich flames, characterized by an equivalence ratio (Φ) exceeding 2.5, for the production of H$_2$-CO-rich synthesis gas. The validation of existing chemical reaction mechanisms for this specific regime pose a significant challenge due to the scarcity of experimental data for this particular range of equivalence ratio.

The scope of this study was therefore the determination of the laminar burning velocity s$_L$ of ultra-rich CH$_4$-O$_2$ flames under varying conditions, such as high equivalence ratios and preheating temperatures using the heat flux burner method. The laminar burning velocity was determined for equivalence ratio within the range of 2.3 < Φ < 3.6 and preheating temperature ranging from 300 K to 455 K. Additionally, the impact of the of reducing the oxygen content in the oxidizer on sL was investigated by argon addition in molar percentages ranging from 40 % to 100 %.

The results of our study reveal laminar burning velocities ranging from 5 cm/s to 45 cm/s for pure oxy-fuel CH4 flames. Preheating is shown to increase sL and this effect can be represented by a power law correlation sL = s$_{L,0}$(T/T$_0$)α with α = 1.53. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000171516
Veröffentlicht am 11.06.2024
Originalveröffentlichung
DOI: 10.1016/j.fuel.2024.131601
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Dimensions
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Engler-Bunte-Institut (EBI)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 15.07.2024
Sprache Englisch
Identifikator ISSN: 0016-2361
KITopen-ID: 1000171516
Erschienen in Fuel
Verlag Elsevier
Band 368
Seiten Art.-Nr.: 131601
Vorab online veröffentlicht am 29.03.2024
Nachgewiesen in Dimensions
Scopus
Web of Science
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