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The thermoacoustic instability in a stratified swirl burner and its passive control by using a slope confinement

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  • Song, Heng
  • Lin, Yuzhen
  • Han, Xiao
  • Yang, Dong
  • Zhang, Chi
  • Sung, Chih-Jen

Abstract

•Mechanisms of thermoacoustic oscillations in the dump confinement are elucidated.•A passive control method is proposed by using the slope confinement.•This method suppresses the flame front wrinkling and flame root angle fluctuation.•The slope confinement reduces the gain of the flame transfer function.•This reduction of the gain enhances the system thermoacoustic stability.

Suggested Citation

  • Song, Heng & Lin, Yuzhen & Han, Xiao & Yang, Dong & Zhang, Chi & Sung, Chih-Jen, 2020. "The thermoacoustic instability in a stratified swirl burner and its passive control by using a slope confinement," Energy, Elsevier, vol. 195(C).
    • Handle: RePEc:eee:energy:v:195:y:2020:i:c:s0360544220300633
    DOI: 10.1016/j.energy.2020.116956
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    References listed on IDEAS

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    1. Wu, Gang & Lu, ZhengLi & Guan, Yiheng & Li, Yuelin & Ji, C.Z., 2018. "Characterizing nonlinear interaction between a premixed swirling flame and acoustics: Heat-driven acoustic mode switching and triggering," Energy, Elsevier, vol. 158(C), pages 546-554.
    2. Fattahi, A. & Hosseinalipour, S.M. & Karimi, N. & Saboohi, Z. & Ommi, F., 2019. "On the response of a lean-premixed hydrogen combustor to acoustic and dissipative-dispersive entropy waves," Energy, Elsevier, vol. 180(C), pages 272-291.
    3. Wu, Gang & Lu, Zhengli & Pan, Weichen & Guan, Yiheng & Li, Shihuai & Ji, C.Z., 2019. "Experimental demonstration of mitigating self-excited combustion oscillations using an electrical heater," Applied Energy, Elsevier, vol. 239(C), pages 331-342.
    4. Hajialigol, N. & Mazaheri, Kiumars, 2017. "Thermal response of a turbulent premixed flame to the imposed inlet oscillating velocity," Energy, Elsevier, vol. 118(C), pages 209-220.
    5. Wu, Gang & Xu, Xiao & Li, S. & Ji, C., 2019. "Experimental studies of mitigating premixed flame-excited thermoacoustic oscillations in T-shaped Combustor using an electrical heater," Energy, Elsevier, vol. 174(C), pages 1276-1282.
    6. Sahebjamei, M. & Amani, E. & Nobari, M.R.H., 2019. "Numerical analysis of radial and angular stratification in turbulent swirling flames," Energy, Elsevier, vol. 173(C), pages 523-539.
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    Cited by:

    1. Zhu, Rongjun & Pan, Deng & Ji, Chenzhen & Zhu, Tong & Lu, Pengpeng & Gao, Han, 2020. "Combustion instability analysis on a partially premixed swirl combustor by thermoacoustic experiments and modeling," Energy, Elsevier, vol. 211(C).
    2. Zhang, Zhihao & Liu, Xiao & Gong, Yaozhen & Yang, Yang & Tang, Zijia & Liu, Gang & Deng, Fuquan & Yang, Jialong & Zheng, Hongtao, 2020. "Experimental study of stratified swirl flame dynamics in a model gas turbine combustor," Energy, Elsevier, vol. 211(C).
    3. Song, Heng & Han, Xiao & Su, Tong & Xue, Xin & Zhang, Chi & Sung, Chih-Jen, 2021. "Parametric study of the slope confinement for passive control in a centrally-staged swirl burner," Energy, Elsevier, vol. 233(C).

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