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Thermal performance of solid walls in a mesoscale combustor with a plate flame holder and preheating channels

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  • Wan, Jianlong
  • Zhao, Haibo

Abstract

The flame is very hard to keep steadily symmetrical for a wide flammability limit under some extreme combustion conditions (such as large heat loss and fuel of low caloric value). Recently, we manufacture a mesoscale combustor with a plate flame holder and preheating channels, which could take the advantage of the flow recirculation and heat recirculation effects. The experimental results show that this special configuration performs excellent in flame-anchoring, and the flame can remain steadily symmetrical at very low equivalence ratio in the normal environment. In order to provide theoretical basis to optimize this combustor, the three-dimensional numerical simulation is used to study the thermal performances of solid walls on unburned fuel mixture quantitatively. The results indicate that the combustor wall does not always have preheating effects on the unburned mixture. Some walls or some parts of walls have the negative effect of heat loss. Furthermore, some interesting boundary shapes of the preheating areas or heat loss areas are found. It is deduced that the thermal performances of combustor walls mainly depend on the side with higher temperature. In addition, the preheating area decreases with an increasing flame height, so a lower flame height is probably beneficial for preheating.

Suggested Citation

  • 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.
  • Handle: RePEc:eee:energy:v:157:y:2018:i:c:p:448-459
    DOI: 10.1016/j.energy.2018.05.189
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    References listed on IDEAS

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    9. Fan, Aiwu & Zhang, He & Wan, Jianlong, 2017. "Numerical investigation on flame blow-off limit of a novel microscale Swiss-roll combustor with a bluff-body," Energy, Elsevier, vol. 123(C), pages 252-259.
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    Cited by:

    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 & 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.
    4. Sun, Bowen & Kang, Xin & Wang, Yu, 2020. "Numerical investigations on the methane-oxygen diffusion flame-street phenomena in a microchannel: Effects of wall temperatures, inflow rates and global equivalence ratios on flame behaviors and combu," Energy, Elsevier, vol. 207(C).
    5. Aravind, B. & Khandelwal, Bhupendra & Ramakrishna, P.A. & Kumar, Sudarshan, 2020. "Towards the development of a high power density, high efficiency, micro power generator," Applied Energy, Elsevier, vol. 261(C).
    6. 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).
    7. Khan, Mohammed Asad & Gadgil, Hrishikesh & Kumar, Sudarshan, 2019. "Influence of liquid properties on atomization characteristics of flow-blurring injector at ultra-low flow rates," Energy, Elsevier, vol. 171(C), pages 1-13.
    8. 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).
    9. Zuo, Wei & Li, Jing & Zhang, Yuntian & Li, Qingqing & He, Zhu, 2020. "Effects of multi-factors on comprehensive performance of a hydrogen-fueled micro-cylindrical combustor by combining grey relational analysis and analysis of variance," Energy, Elsevier, vol. 199(C).
    10. Wang, Wei & Zuo, Zhengxing & Liu, Jinxiang, 2019. "Experimental study and numerical analysis of the scaling effect on the flame stabilization of propane/air mixture in the micro-scale porous combustor," Energy, Elsevier, vol. 174(C), pages 509-518.

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