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Analysis of CH$_{2}$O x OH as marker for fuel-rich air to pure oxy-fuel flames under higher preheat temperature and elevated pressure

Sentko, M.; Habisreuther, P. ORCID iD icon; Vourliotakis, G.; Keramiotis, Ch.; Stelzner, B.; Founti, M.; Trimis, D.


The scope of the present work is a numerical and experimental investigation about the range of validity in terms of applicability of CH$_{2}$OxOH as a marker for the heat release rate (HRR) for fuel-rich air to pure oxy-fuel flames including preheating and elevated pressure. Therefore, laminar, freely propagating 1d CH$_{4}$ flames were calculated, where oxygen content in the oxidizer (from air to pure oxy-fuel combustion), inlet temperature and pressure were varied for a wide range of the equivalence ratios. The preheat temperature and pressure were parametrically changed from 300 K to 573 K and 1 bar to 5 bar, respectively. Different reaction mechanisms were used, namely GRI30, DLR, USC/II, Caltech2.3 and ABF. The performance of the CH$_{2}$OxOH as a marker for HRR is assessed in terms of correlation coefficients of their profiles in laminar flames.
The comparison of the obtained correlations of CH$_{4}$/air and CH$_{4}$/O$_{2}$ flames shows that in case of air combustion, the HRR can be accurately estimated by the product of CH$_{2}$OxOH for slightly rich flames (Φ = 1.5), whereas the quality of the correlation degrades with increasing equivalence ratio. ... mehr

Preprint §
DOI: 10.5445/IR/1000096942
Veröffentlicht am 02.05.2022
Cover der Publikation
Zugehörige Institution(en) am KIT Engler-Bunte-Institut (EBI)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2019
Sprache Englisch
Identifikator KITopen-ID: 1000096942
HGF-Programm 34.14.02 (POF III, LK 01) Vergasung
Erschienen in Proceedings of the 9th European Combustion Meeting
Veranstaltung 9th European Combustion Meeting (ECM 2019), Lissabon, Portugal, 14.04.2019 – 17.04.2019
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