Response mechanism of methane non-premixed diffusion flame under the influence of an applied magnetic field
To explore the influence of an applied magnetic field on non-premixed diffusion flames, a methane non-premixed diffusion flame combustion system was constructed. MATLAB was utilized for processing flame split-frame images, while DPIV technology was employed to analyze the two-dimensional instantaneo...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-04-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25002047 |
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| author | Yaqing Li Haochen Li Jun Deng Yutao Zhang Chi-Min Shu Qiang Guo Bo Che |
| author_facet | Yaqing Li Haochen Li Jun Deng Yutao Zhang Chi-Min Shu Qiang Guo Bo Che |
| author_sort | Yaqing Li |
| collection | DOAJ |
| description | To explore the influence of an applied magnetic field on non-premixed diffusion flames, a methane non-premixed diffusion flame combustion system was constructed. MATLAB was utilized for processing flame split-frame images, while DPIV technology was employed to analyze the two-dimensional instantaneous flow field of the flame. A custom-built Langmuir ion probe was used to monitor the variation in flame ionic current concentration. The study reveals that under constant excitation voltage, magnetic intensity along the flame axis decreases linearly with nozzle distance, exceeding a 60 % reduction. In a negative gradient field, the flame elongates, with height increasing and width narrowing as the magnetic field gradient intensifies. The applied magnetic field raised the average flame temperature significantly, peaking at a 379.4 °C increase for a 20 mm nozzle at 100 V, while jet exit temperature decreased with higher flow rates. Ionic current along the flame axis increased with nozzle distance, improving combustion efficiency. At a flow rate of 0.60 slpm, ionic current dropped sharply at the jet exit due to charged particle accumulation near the flame tip. The ionic current rose from sub-microamp to microamp levels under the magnetic field, providing valuable insights for flame combustion regulation. |
| format | Article |
| id | doaj-art-7775c2d4f088428fbd0ae11d06a5f229 |
| institution | OA Journals |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-7775c2d4f088428fbd0ae11d06a5f2292025-08-20T01:57:40ZengElsevierCase Studies in Thermal Engineering2214-157X2025-04-016810594410.1016/j.csite.2025.105944Response mechanism of methane non-premixed diffusion flame under the influence of an applied magnetic fieldYaqing Li0Haochen Li1Jun Deng2Yutao Zhang3Chi-Min Shu4Qiang Guo5Bo Che6School of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, Shaanxi, 710054, PR China; Shaanxi Key Laboratory of Prevention and Control of Coal Fire, No. 58, Yanta Mid. Rd., Xi'an, Shaanxi, 710054, PR ChinaSchool of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, Shaanxi, 710054, PR China; Shaanxi Key Laboratory of Prevention and Control of Coal Fire, No. 58, Yanta Mid. Rd., Xi'an, Shaanxi, 710054, PR China; Corresponding author. School of Safety Science and Engineering, Xi'an University of Science and Technology, No. 58, Yanta Mid. Rd., Xi'an 710054, Shaanxi Province, PR China.School of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, Shaanxi, 710054, PR China; Shaanxi Key Laboratory of Prevention and Control of Coal Fire, No. 58, Yanta Mid. Rd., Xi'an, Shaanxi, 710054, PR China; Corresponding author. School of Safety Science and Engineering, Xi'an University of Science and Technology, No. 58, Yanta Mid. Rd., Xi'an 710054, Shaanxi Province, PR China.School of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, Shaanxi, 710054, PR China; Shaanxi Key Laboratory of Prevention and Control of Coal Fire, No. 58, Yanta Mid. Rd., Xi'an, Shaanxi, 710054, PR ChinaDepartment of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology, Yunlin, Douliou, 64002, Taiwan, ROCSchool of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, Shaanxi, 710054, PR China; Shaanxi Key Laboratory of Prevention and Control of Coal Fire, No. 58, Yanta Mid. Rd., Xi'an, Shaanxi, 710054, PR ChinaSchool of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, Shaanxi, 710054, PR ChinaTo explore the influence of an applied magnetic field on non-premixed diffusion flames, a methane non-premixed diffusion flame combustion system was constructed. MATLAB was utilized for processing flame split-frame images, while DPIV technology was employed to analyze the two-dimensional instantaneous flow field of the flame. A custom-built Langmuir ion probe was used to monitor the variation in flame ionic current concentration. The study reveals that under constant excitation voltage, magnetic intensity along the flame axis decreases linearly with nozzle distance, exceeding a 60 % reduction. In a negative gradient field, the flame elongates, with height increasing and width narrowing as the magnetic field gradient intensifies. The applied magnetic field raised the average flame temperature significantly, peaking at a 379.4 °C increase for a 20 mm nozzle at 100 V, while jet exit temperature decreased with higher flow rates. Ionic current along the flame axis increased with nozzle distance, improving combustion efficiency. At a flow rate of 0.60 slpm, ionic current dropped sharply at the jet exit due to charged particle accumulation near the flame tip. The ionic current rose from sub-microamp to microamp levels under the magnetic field, providing valuable insights for flame combustion regulation.http://www.sciencedirect.com/science/article/pii/S2214157X25002047Applied magnetic fieldDiffusion flameMagnetic induction distributionCombustion characteristicsIonic current |
| spellingShingle | Yaqing Li Haochen Li Jun Deng Yutao Zhang Chi-Min Shu Qiang Guo Bo Che Response mechanism of methane non-premixed diffusion flame under the influence of an applied magnetic field Case Studies in Thermal Engineering Applied magnetic field Diffusion flame Magnetic induction distribution Combustion characteristics Ionic current |
| title | Response mechanism of methane non-premixed diffusion flame under the influence of an applied magnetic field |
| title_full | Response mechanism of methane non-premixed diffusion flame under the influence of an applied magnetic field |
| title_fullStr | Response mechanism of methane non-premixed diffusion flame under the influence of an applied magnetic field |
| title_full_unstemmed | Response mechanism of methane non-premixed diffusion flame under the influence of an applied magnetic field |
| title_short | Response mechanism of methane non-premixed diffusion flame under the influence of an applied magnetic field |
| title_sort | response mechanism of methane non premixed diffusion flame under the influence of an applied magnetic field |
| topic | Applied magnetic field Diffusion flame Magnetic induction distribution Combustion characteristics Ionic current |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25002047 |
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