Efficient metal fiber burner characterization: chemiluminescence and image analysis

Roya Azizi, Zahra Farboud and Mohammad Zabetian Targhi

Energy, 2025, vol. 333, issue C

Abstract: This study investigated the performance of a cylindrical premixed metal fiber burner using modern combustion measurement techniques, including image analysis, chemiluminescence, and two-color pyrometry. The burner was experimentally analyzed at equivalence ratios of 0.48–1.30 and operating thermal loads between 9.3 and 18.7 kW. Image analysis revealed that the metal fiber burner exhibits rich turquoise surface flame, submerged combustion with cellular flames, and blue surface flame regimes. Maximum OH∗ and H2O∗ chemiluminescence was observed at equivalence ratios of 0.9–0.95, correlating with the maximum flame and surface temperature. Maximum NOx concentrations were detected below 20.6 ppm, and Minimum CO concentrations were found in the equivalence ratio range of 0.75–1.0. Eventually, a performance map was provided for the metal fiber burner, highlighting its optimal performance in the equivalence ratio range of 0.9–0.95 within the stable submerged combustion with blue cellular flames. This satisfactory operating zone is characterized by maximum heat release, minimum CO pollutants indicating complete combustion, and stable lean flames regardless of thermal efficiency and burner lifetime. The metal fiber burner demonstrated optimal performance at richer equivalence ratios and exhibited lower CO emissions than the cylindrical perforated burner.

Keywords: Metal fiber burner; Chemiluminescence; Two-color pyrometry; Image analysis; Performance map (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:333:y:2025:i:c:s0360544225030336

DOI: 10.1016/j.energy.2025.137391

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