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Effect of thermal condition of solid wall on the stabilization of a preheated and holder-stabilized laminar premixed flame

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  • Wan, Jianlong
  • Zhao, Haibo

Abstract

A novel combustor with a flame holder and preheating channels was developed to investigate the synergistic effect of heat and flow recirculation on combustion characteristics. This paper mainly focuses on the thermal condition of flame holder and combustion chamber wall (CCW) and their interaction on flame stabilization. Based on the distribution characteristics of temperature and flow fields, it can be deduced that the interaction between the flame holder and CCW can further increase the incoming fresh mixture temperature and decrease the height of recirculation zone, which subsequently affect the anchoring locations and temperatures of the flame root and top. To be more specific, the flame holder and CCW synergistically improve the preheating temperature of fresh mixture, making it higher than simple linear superposition. Moreover, the anchoring location of the flame root is mainly determined by the heat exchange of flame holder, but CCW matters more significantly for the flame top. Additionally, the anchoring temperature of the flame root is higher than that of the flame top. This study can help us to gain insights into the effect of conjugate heat exchange on flame stability when the effect of heat recirculation and flow recirculation works synergistically in practical combustors (like aero-engine).

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  • Wan, Jianlong & Zhao, Haibo, 2020. "Effect of thermal condition of solid wall on the stabilization of a preheated and holder-stabilized laminar premixed flame," Energy, Elsevier, vol. 200(C).
    • Handle: RePEc:eee:energy:v:200:y:2020:i:c:s0360544220306551
    DOI: 10.1016/j.energy.2020.117548
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    References listed on IDEAS

    as
    1. Wan, Jianlong & Zhao, Haibo, 2020. "Effect of conjugate heat exchange of flame holder on laminar premixed flame stabilization in a meso-scale diverging combustor," Energy, Elsevier, vol. 198(C).
    2. Wan, Jianlong & Xu, Zuwei & Zhao, Haibo, 2018. "Methane/air premixed flame topology structure in a mesoscale combustor with a plate flame holder and preheating channels," Energy, Elsevier, vol. 165(PB), pages 802-811.
    3. Wan, Jianlong & Zhao, Haibo, 2018. "Thermal performance of solid walls in a mesoscale combustor with a plate flame holder and preheating channels," Energy, Elsevier, vol. 157(C), pages 448-459.
    4. Tang, Aikun & Cai, Tao & Deng, Jiang & Zhao, Dan & Huang, Qiuhan & Zhou, Chen, 2019. "Experimental study on flame structure transitions of premixed propane/air in micro-scale planar combustors," Energy, Elsevier, vol. 179(C), pages 558-570.
    5. Peng, Qingguo & Jiaqiang, E & Yang, W.M. & Xu, Hongpeng & Chen, Jingwei & Zhang, Feng & Meng, Tian & Qiu, Runzhi, 2019. "Experimental and numerical investigation of a micro-thermophotovoltaic system with different backward-facing steps and wall thicknesses," Energy, Elsevier, vol. 173(C), pages 540-547.
    6. Veeraragavan, Ananthanarayanan, 2015. "On flame propagation in narrow channels with enhanced wall thermal conduction," Energy, Elsevier, vol. 93(P1), pages 631-640.
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    1. Wan, Jianlong & Zhao, Haibo, 2021. "Ultra-rich fuel dynamics of a holder-stabilized premixed flame in a preheated mesoscale combustor," Energy, Elsevier, vol. 214(C).
    2. Yang, Xiao & Yang, Wenming & Dong, Shikui & Tan, Heping, 2020. "Flame stability analysis of premixed hydrogen/air mixtures in a swirl micro-combustor," Energy, Elsevier, vol. 209(C).
    3. Wan, Jianlong & Zhao, Haibo, 2021. "Ultra-lean blow-off dynamics of a holder-stabilized premixed flame in a preheated mesoscale combustor near laminar critical condition," Energy, Elsevier, vol. 228(C).

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