Enhancing temperature uniformity and recirculation in MILD combustion furnace: A study on angle of Burner's bluff body
This study compares the burner geometry modifications, specifically adjusting fuel and air inlet angles (α), on MILD combustion furnace performance. The objective is to improve temperature uniformity, enhance internal recirculation, and reduce pollutant emissions by replacing the curved bluff body w...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-09-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25008214 |
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| author | Mahdi Zourazmai Mohammad Zabetian Targhi Ali Ashouri |
| author_facet | Mahdi Zourazmai Mohammad Zabetian Targhi Ali Ashouri |
| author_sort | Mahdi Zourazmai |
| collection | DOAJ |
| description | This study compares the burner geometry modifications, specifically adjusting fuel and air inlet angles (α), on MILD combustion furnace performance. The objective is to improve temperature uniformity, enhance internal recirculation, and reduce pollutant emissions by replacing the curved bluff body with a linear configuration at varying α. Results show that optimizing α significantly enhances performance, with α = 15° yielding the best results. This configuration reduced the maximum temperature by 20 K, increased the average temperature by 7 K, and improved internal recirculation by 20.6 %, ensuring better fuel-air mixing and a more extended reaction zone. The Damköhler number decreased by 33.3 %, indicating a transition to a mixing-dominated reaction regime. Additionally, NO and CO emissions for α = 15° were reduced to below 1 mg/kJ and 2 ppm, respectively, meeting EPA standards. These improvements are attributed to enhanced vortex mixing, which lowers peak temperatures and stabilizes combustion. Quantitative assessments of heat release rate and OH radical distribution confirmed the effectiveness of the modifications in maintaining MILD combustion conditions. In conclusion, optimizing burner geometry significantly improves MILD combustion stability, efficiency, and emissions, demonstrating the potential of burner design refinements for sustainable industrial applications. |
| format | Article |
| id | doaj-art-530147df6f544fbfbfe31b493ee02458 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-530147df6f544fbfbfe31b493ee024582025-08-20T03:24:28ZengElsevierCase Studies in Thermal Engineering2214-157X2025-09-017310656110.1016/j.csite.2025.106561Enhancing temperature uniformity and recirculation in MILD combustion furnace: A study on angle of Burner's bluff bodyMahdi Zourazmai0Mohammad Zabetian Targhi1Ali Ashouri2Mechanical Engineering Department, Tarbiat Modares University, Tehran, IranCorresponding author.; Mechanical Engineering Department, Tarbiat Modares University, Tehran, IranMechanical Engineering Department, Tarbiat Modares University, Tehran, IranThis study compares the burner geometry modifications, specifically adjusting fuel and air inlet angles (α), on MILD combustion furnace performance. The objective is to improve temperature uniformity, enhance internal recirculation, and reduce pollutant emissions by replacing the curved bluff body with a linear configuration at varying α. Results show that optimizing α significantly enhances performance, with α = 15° yielding the best results. This configuration reduced the maximum temperature by 20 K, increased the average temperature by 7 K, and improved internal recirculation by 20.6 %, ensuring better fuel-air mixing and a more extended reaction zone. The Damköhler number decreased by 33.3 %, indicating a transition to a mixing-dominated reaction regime. Additionally, NO and CO emissions for α = 15° were reduced to below 1 mg/kJ and 2 ppm, respectively, meeting EPA standards. These improvements are attributed to enhanced vortex mixing, which lowers peak temperatures and stabilizes combustion. Quantitative assessments of heat release rate and OH radical distribution confirmed the effectiveness of the modifications in maintaining MILD combustion conditions. In conclusion, optimizing burner geometry significantly improves MILD combustion stability, efficiency, and emissions, demonstrating the potential of burner design refinements for sustainable industrial applications.http://www.sciencedirect.com/science/article/pii/S2214157X25008214Industrial furnaceBurner modificationsMILD regimeTemperature uniformityCFD simulationPollutant emissions |
| spellingShingle | Mahdi Zourazmai Mohammad Zabetian Targhi Ali Ashouri Enhancing temperature uniformity and recirculation in MILD combustion furnace: A study on angle of Burner's bluff body Case Studies in Thermal Engineering Industrial furnace Burner modifications MILD regime Temperature uniformity CFD simulation Pollutant emissions |
| title | Enhancing temperature uniformity and recirculation in MILD combustion furnace: A study on angle of Burner's bluff body |
| title_full | Enhancing temperature uniformity and recirculation in MILD combustion furnace: A study on angle of Burner's bluff body |
| title_fullStr | Enhancing temperature uniformity and recirculation in MILD combustion furnace: A study on angle of Burner's bluff body |
| title_full_unstemmed | Enhancing temperature uniformity and recirculation in MILD combustion furnace: A study on angle of Burner's bluff body |
| title_short | Enhancing temperature uniformity and recirculation in MILD combustion furnace: A study on angle of Burner's bluff body |
| title_sort | enhancing temperature uniformity and recirculation in mild combustion furnace a study on angle of burner s bluff body |
| topic | Industrial furnace Burner modifications MILD regime Temperature uniformity CFD simulation Pollutant emissions |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25008214 |
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