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Structures of inverse jet flames stabilized on a coaxial burner

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  • Kapusta, Łukasz Jan
  • Shuang, Chen
  • Aldén, Marcus
  • Li, Zhongshan

Abstract

In this study we investigate different parameters used for mapping global flame structures and identify the most universal in terms of comparing flames emerging from different geometrical burner arrangements. Simultaneously the study was carried out to determine the discharge conditions yielding the blue flame of a high degree of partial premixing, and to examine the instantaneous local flame structures and mixing in the blue torch area under these conditions. In order to decouple velocity ratio and global equivalence ratio (referring to the mass flow rate of air and methane), as well as the jet velocity and Reynolds number, two different centre air nozzle diameters were studied. The results clearly indicated that the centre jet Reynolds number and global equivalence ratio are more universal parameters for inverse flame characterization than jet velocity and velocity ratio. OH-PLIF (planar laser-induced fluorescence), hot- and cold-flow acetone-PLIF were performed to provide additional information on instantaneous local flame structures and mixing in the blue torch area of the flame resembling a partially premixed flame. The PLIF results indicated that in the area of the blue torch, air and gas are well mixed by shear layer-generated vortices, and turbulences, which at this position are strongly present.

Suggested Citation

  • Kapusta, Łukasz Jan & Shuang, Chen & Aldén, Marcus & Li, Zhongshan, 2020. "Structures of inverse jet flames stabilized on a coaxial burner," Energy, Elsevier, vol. 193(C).
    • Handle: RePEc:eee:energy:v:193:y:2020:i:c:s0360544219324521
    DOI: 10.1016/j.energy.2019.116757
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    References listed on IDEAS

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    1. Rabee, Basem A., 2018. "The effect of inverse diffusion flame burner-diameter on flame characteristics and emissions," Energy, Elsevier, vol. 160(C), pages 1201-1207.
    2. Choi, Sun & Kim, Tae Young & Kim, Hee Kyung & Koo, Jaye & Kim, Jeong Soo & Kwon, Oh Chae, 2015. "Properties of inverse nonpremixed pure O2/CH4 coflow flames in a model combustor," Energy, Elsevier, vol. 93(P1), pages 1105-1115.
    3. Kim, Tae Young & Kim, Young Hoo & Ahn, Yeong Jong & Choi, Sun & Kwon, Oh Chae, 2019. "Combustion stability of inverse oxygen/hydrogen coaxial jet flames at high pressure," Energy, Elsevier, vol. 180(C), pages 121-132.
    4. Kim, Tae Young & Choi, Sun & Kim, Young Hoo & Ahn, Yeong Jong & Kim, Hee Kyung & Kwon, Oh Chae, 2018. "Combustion characteristics of gaseous inverse O2/H2 coaxial jet flames in a single-element model combustor," Energy, Elsevier, vol. 155(C), pages 262-271.
    5. Zhen, H.S. & Choy, Y.S. & Leung, C.W. & Cheung, C.S., 2011. "Effects of nozzle length on flame and emission behaviors of multi-fuel-jet inverse diffusion flame burner," Applied Energy, Elsevier, vol. 88(9), pages 2917-2924.
    6. De Giorgi, Maria Grazia & Ficarella, Antonio & Sciolti, Aldebara & Pescini, Elisa & Campilongo, Stefano & Di Lecce, Giorgio, 2017. "Improvement of lean flame stability of inverse methane/air diffusion flame by using coaxial dielectric plasma discharge actuators," Energy, Elsevier, vol. 126(C), pages 689-706.
    7. Dong, L.L. & Cheung, C.S. & Leung, C.W., 2011. "Combustion optimization of a port-array inverse diffusion flame jet," Energy, Elsevier, vol. 36(5), pages 2834-2846.
    8. Miao, J. & Leung, C.W. & Cheung, C.S. & Huang, Z.H. & Zhen, H.S., 2016. "Effect of hydrogen addition on overall pollutant emissions of inverse diffusion flame," Energy, Elsevier, vol. 104(C), pages 284-294.
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    Cited by:

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    3. Dou, Yuling & Liu, Haiqiang & Liu, Bin & Zhang, Yu & Liu, Yongqiang & Cheng, Xiaozhang & Tao, Changfa, 2021. "Effects of carbon dioxide addition to fuel on flame radiation fraction in propane diffusion flames," Energy, Elsevier, vol. 218(C).
    4. Song, Yawei & Su, Sheng & Chen, Yifeng & Liu, Yushuai & Zhao, Zheng & Wang, Jingyan & Ren, Qiangqiang & Han, Hengda & Xu, Kai & Xu, Jun & Jiang, Long & Wang, Yi & Hu, Song & Xiang, Jun, 2023. "Effects of moisture on soot generation and ignition of coal particle: Investigation and evaluation with OH-planar laser induced fluorescence," Energy, Elsevier, vol. 278(PA).
    5. Xie, Kai & Cui, Yunjing & Qiu, Xingqi & Wang, Jianxin, 2020. "Experimental study on flame characteristics and air entrainment of diesel horizontal spray burners at two different atmospheric pressures," Energy, Elsevier, vol. 211(C).

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