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Combustion characteristics of gaseous diffusion flames emanating from a novel eco-friendly swirl-induced burner at a constant heating load: Energy approach

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  • Abd-Elgawad, Ahmed Mahfouz M.M.
  • Emara, Karim
  • Emara, Ahmed

Abstract

Combustion applications deal with exhaust emissions reduction without affecting combustion performance. This article displays comparative investigations of combustion characteristics experimentally and numerically (CFX) at constant heating load (10 kW) at different equivalence ratios. The combustion processes are maintained by an innovative designed swirl-induced LPG burner. The firing modes are (AFA) or without (AF-) according to annular air existence or not. The combustion measurements include thermal flame contours, exhaust gas emissions, stack losses, and combustor efficiency. A cylindrical water-cooled combustor is vertically mounted co-axial with burner centerline. The numerical modeling results show good agreement with the experimental measurements. Visual and thermal flame length is directly proportional to equivalence ratios at AF- and AFA operating conditions. The flow field modeling shows that AFA flames possessed dual recirculation zones that helps in mixing. AFA flames produce lower CO emissions at φ = 0.79, 0.86, and 0.96 than AF- flames; but thermal NOx emissions of AFA flames are higher due to a higher reaction rate. CO and N2 mass fractions emissions gave good agreement with experimental investigations.

Suggested Citation

  • Abd-Elgawad, Ahmed Mahfouz M.M. & Emara, Karim & Emara, Ahmed, 2025. "Combustion characteristics of gaseous diffusion flames emanating from a novel eco-friendly swirl-induced burner at a constant heating load: Energy approach," Energy, Elsevier, vol. 324(C).
    • Handle: RePEc:eee:energy:v:324:y:2025:i:c:s0360544225016597
    DOI: 10.1016/j.energy.2025.136017
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    References listed on IDEAS

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    1. Mahfouz, Ahmed & Moneib, H.A. & El-fatih, Ahmed & El-Sherif, Ashraf F. & Ayoub, H.S. & Emara, Ahmed, 2020. "Comparative study among waste cooking oil blends flame spectroscopy as an alternative fuel through using an industrial burner," Renewable Energy, Elsevier, vol. 159(C), pages 893-907.
    2. Atabani, A.E. & Badruddin, Irfan Anjum & Mekhilef, S. & Silitonga, A.S., 2011. "A review on global fuel economy standards, labels and technologies in the transportation sector," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(9), pages 4586-4610.
    3. Szubel, M. & Papis-Frączek, K. & Podlasek, S., 2024. "Impact of the air supply system configuration on the straw combustion in small scale batch-boiler - experimental and numerical studies," Renewable Energy, Elsevier, vol. 220(C).
    4. Emara, Ahmed & Abd-Elgawad, Ahmed Mahfouz M.M. & Emara, Karim, 2024. "Innovative eco-friendly design solutions for energy demands using swirl- induced burner by jets," Energy, Elsevier, vol. 304(C).
    5. Baek, Seungju & Lee, Sanguk & Shin, Myunghwan & Lee, Jongtae & Lee, Kihyung, 2022. "Analysis of combustion and exhaust characteristics according to changes in the propane content of LPG," Energy, Elsevier, vol. 239(PC).
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