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Experimental Analysis on Flame Flickering of a Swirl Partially Premixed Combustion

Author

Listed:
  • Zhongya Xi

    (National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Beijing 102206, China)

  • Zhongguang Fu

    (National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Beijing 102206, China)

  • Syed Waqas Sabir

    (National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Beijing 102206, China)

  • Xiaotian Hu

    (National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Beijing 102206, China)

  • Yibo Jiang

    (National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Beijing 102206, China)

  • Tao Zhang

    (National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Beijing 102206, China)

Abstract

An experiment was conducted to explore the flickering parameters under varying mass flow rate of fuel m ˙ F with spatial analysis and global analysis. The parameters include mean value, flickering weighted average frequency F , flickering coefficient of variation c v (firstly introduced), skewness s , and kurtosis k . From the spatial analysis, it was found that the brightest part of flame is located in its core, and the brightness gradually decreased from the inside out. The distributions of high levels of F , c v , s , and k are almost consistent, all lying in the flickering edge, which is a thin layer where the parameters sharply declined. From the global analysis, with the increment of m ˙ F , the global F decreased slightly; the global c v declined uniformly, which means the oscillation amplitude diminished and thus the flame became more stable; the global s linearly reduced; and the global k also showed a decreasing trend. The decreasing global s indicates that the number distribution gradually became symmetric, and the decreasing global k indicates that the number distribution progressively became flat. Consequently, the number distribution progressively tends to normal distribution at larger m ˙ F .

Suggested Citation

  • Zhongya Xi & Zhongguang Fu & Syed Waqas Sabir & Xiaotian Hu & Yibo Jiang & Tao Zhang, 2018. "Experimental Analysis on Flame Flickering of a Swirl Partially Premixed Combustion," Energies, MDPI, vol. 11(9), pages 1-14, September.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:9:p:2430-:d:169692
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    References listed on IDEAS

    as
    1. Mao Li & Yiheng Tong & Jens Klingmann & Marcus Thern, 2017. "Impact of Vitiation on a Swirl-Stabilized and Premixed Methane Flame," Energies, MDPI, vol. 10(10), pages 1-16, October.
    2. Zhongya Xi & Zhongguang Fu & Xiaotian Hu & Syed Waqas Sabir & Yibo Jiang, 2018. "An Experimental Investigation on Flame Pulsation for a Swirl Non-Premixed Combustion," Energies, MDPI, vol. 11(7), pages 1-17, July.
    3. González-Cencerrado, A. & Peña, B. & Gil, A., 2012. "Coal flame characterization by means of digital image processing in a semi-industrial scale PF swirl burner," Applied Energy, Elsevier, vol. 94(C), pages 375-384.
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