For achieving efficient oxy-coal combustion in a MILD (Moderate or Intense Low Oxygen Dilution) state, the optimum operating conditions with high-velocity jets in a lab-scale cylindrical furnace (Φ200mm×2000mm) was determined. The mesoscopic characteristics of turbulent and flame behavior under different jet design and jet spacing were simulated and compared. The results show that L=30∼60mm(O2 side) and L=60mm(O2 center) conditions are recommended as oxy-coal MILD combustion as well as IFRF furnace condition, the flame front locates in distributed regime, the global regime was depict as 1 < l/lF < 4, 60 < ReT < 150 and 50 < Ka < 500 ; for flaming conditions, the flame front locates in small-scale turbulent regime or thin reaction zone, the global regime was depicted as 0.5 < l/lF < 4, 40 < ReT < 110 and 30 < Ka < 900 ; with high-velocity oxygen jet technology, the combustion process is in slow chemistry regime (Da << 1), governed by chemical-kinetic mechanism; large spacing (L=75mm) is not favored for co-flow burners due to poor radial mixing as well as the restriction of wall.
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ASME 2016 Power Conference collocated with the ASME 2016 10th International Conference on Energy Sustainability and the ASME 2016 14th International Conference on Fuel Cell Science, Engineering and Technology
June 26–30, 2016
Charlotte, North Carolina, USA
Conference Sponsors:
- Power Division
- Advanced Energy Systems Division
- Solar Energy Division
- Nuclear Engineering Division
ISBN:
978-0-7918-5021-3
PROCEEDINGS PAPER
Numerical Study on Flame Mesoscopic-Characteristics of Oxy-Coal Mild Combustion
Ruochen Liu,
Ruochen Liu
Tongji University, Shanghai, China
Search for other works by this author on:
Kun Wu
Kun Wu
Tongji University, Shanghai, China
Search for other works by this author on:
Ruochen Liu
Tongji University, Shanghai, China
Enke An
Tongji University, Shanghai, China
Kun Wu
Tongji University, Shanghai, China
Paper No:
POWER2016-59006, V001T11A001; 8 pages
Published Online:
November 1, 2016
Citation
Liu, R, An, E, & Wu, K. "Numerical Study on Flame Mesoscopic-Characteristics of Oxy-Coal Mild Combustion." Proceedings of the ASME 2016 Power Conference collocated with the ASME 2016 10th International Conference on Energy Sustainability and the ASME 2016 14th International Conference on Fuel Cell Science, Engineering and Technology. ASME 2016 Power Conference. Charlotte, North Carolina, USA. June 26–30, 2016. V001T11A001. ASME. https://doi.org/10.1115/POWER2016-59006
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