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Combustion optimization of a port-array inverse diffusion flame jet

Author

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  • Dong, L.L.
  • Cheung, C.S.
  • Leung, C.W.

Abstract

This paper is an experimental study on the combustion optimization of an Innovative Inverse Diffusion Flame (IDF) characterized by a central air jet surrounded by an array of fuel jets for impingement heating. An extensive investigation has been performed to explore the effects of the diameter ratio between air port and fuel port (dair/dfuel) on the IDF structure, particularly on its thermal and emission characteristics. Small, moderate and large dair/dfuel are investigated. It is found that under the same air flow rate (Q˙air) and dfuel, dair exerts a significant influence on the behavior of the IDF by changing air/fuel hydrodynamics including air/fuel mixing intensity and air entrainment intensity. The experimental results show that smaller dair produces a blue flame with better thermal characteristics, with higher maximum flame temperature (Tf,max), wider range of air jet Reynolds number (Reair) for flame stability, and wider operation range of the overall equivalence ratio, Φ. On the emission side, smaller dair is found to produce more incomplete combustion products of CO and HC but less NOx, which is attributed to lower volume of high-temperature zone and shorter flame residence time. The current investigation provides a valuable input for combustion and design optimization of this innovative IDF burner for impingement heating.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:5:p:2834-2846
    DOI: 10.1016/j.energy.2011.02.025
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    References listed on IDEAS

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    1. Makmool, U. & Jugjai, S. & Tia, S. & Vallikul, P. & Fungtammasan, B., 2007. "Performance and analysis by particle image velocimetry (PIV) of cooker-top burners in Thailand," Energy, Elsevier, vol. 32(10), pages 1986-1995.
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    Cited by:

    1. Wan, Huaxian & Gao, Zihe & Ji, Jie & Zhang, Yongming & Li, Kaiyuan, 2018. "Experimental and theoretical study on flame front temperatures within ceiling jets from turbulent diffusion flames of n-heptane fuel," Energy, Elsevier, vol. 164(C), pages 79-86.
    2. Yuan, Ye & Li, GuoXiu & Sun, ZuoYu & Li, HongMeng & Zhou, ZiHang, 2016. "Experimental study on the dynamical features of a partially premixed methane jet flame in coflow," Energy, Elsevier, vol. 111(C), pages 593-598.
    3. 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.
    4. 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).
    5. Haisheng Zhen & Zhilong Wei & Zhenbin Chen, 2018. "Effect of N 2 Replacement by CO 2 in Coaxial-Flow on the Combustion and Emission of a Diffusion Flame," Energies, MDPI, vol. 11(5), pages 1-16, April.
    6. Dong, L.L. & Cheung, C.S. & Leung, C.W., 2013. "Heat transfer optimization of an impinging port-array inverse diffusion flame jet," Energy, Elsevier, vol. 49(C), pages 182-192.
    7. Maria Grazia De Giorgi & Aldebara Sciolti & Stefano Campilongo & Antonio Ficarella, 2017. "Flame Structure and Chemiluminescence Emissions of Inverse Diffusion Flames under Sinusoidally Driven Plasma Discharges," Energies, MDPI, vol. 10(3), pages 1-15, March.
    8. De la Cruz-Ávila, M. & Martínez-Espinosa, E. & Polupan, Georgiy & Vicente, W., 2017. "Numerical study of the effect of jet velocity on methane-oxygen confined inverse diffusion flame in a 4 Lug-Bolt array," Energy, Elsevier, vol. 141(C), pages 1629-1649.
    9. Zare, Saeid & Lo, Hao Wei & Roy, Shrabanti & Askari, Omid, 2020. "On the low-temperature plasma discharge in methane/air diffusion flames," Energy, Elsevier, vol. 197(C).
    10. 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.
    11. Lawal, Mohammed S. & Fairweather, Michael & Gogolek, Peter & Ingham, Derek B. & Ma, Lin & Pourkashanian, Mohamed & Williams, Alan, 2013. "CFD predictions of wake-stabilised jet flames in a cross-flow," Energy, Elsevier, vol. 53(C), pages 259-269.
    12. 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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