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Numerical study of the effects of heat transfer methods on CH4/(CH4 + H2)-AIR pre-mixed flames in a micro-stepped tube

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  • Zarvandi, Jalal
  • Tabejamaat, Sadegh
  • Baigmohammadi, Mohammadreza

Abstract

In this study, an approach to modification and improvement of CH4/air pre-mixed flame in a micro-stepped tube is numerically studied. The effects of added hydrogen to methane as an additive, entrance mixture velocity and some physical properties such as the micro-stepped tube wall thermal conductivity and the outer wall convective and radiative heat transfer coefficients on temperature distribution and combustion progress in a micro-stepped tube are calculated using a high order, high accuracy 2D numerical laminar steady state code. The results show that adding hydrogen to methane in a micro-stepped tube can play a pivotal role in modification processes of combustion phenomena in a micro combustor. Also, it is found that adding hydrogen to CH4 can assure the flame presence in some certain conditions in comparison to the simple backward facing step method. Moreover, adding hydrogen can improve the concentration of the combustion vital radicals and also temperature distribution along the micro combustor, impressively. In this regard, adding hydrogen to methane as an additive sustains the combustion vital radicals against the variation of the heat transfer conditions in or around a micro-combustor.

Suggested Citation

  • Zarvandi, Jalal & Tabejamaat, Sadegh & Baigmohammadi, Mohammadreza, 2012. "Numerical study of the effects of heat transfer methods on CH4/(CH4 + H2)-AIR pre-mixed flames in a micro-stepped tube," Energy, Elsevier, vol. 44(1), pages 396-409.
    • Handle: RePEc:eee:energy:v:44:y:2012:i:1:p:396-409
    DOI: 10.1016/j.energy.2012.06.015
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    References listed on IDEAS

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    1. Khu, Kerwin & Jiang, Liudi & Markvart, Tom, 2011. "Effect of finite heat input on the power performance of micro heat engines," Energy, Elsevier, vol. 36(5), pages 2686-2692.
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    Cited by:

    1. He, Ziqiang & Yan, Yunfei & Zhao, Ting & Zhang, Zhien & Mikulčić, Hrvoje, 2022. "Parametric study of inserting internal spiral fins on the micro combustor performance for thermophotovoltaic systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 165(C).
    2. Yilmaz, Harun & Cam, Omer & Yilmaz, Ilker, 2017. "Effect of micro combustor geometry on combustion and emission behavior of premixed hydrogen/air flames," Energy, Elsevier, vol. 135(C), pages 585-597.
    3. 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.
    4. Tang, Aikun & Deng, Jiang & Cai, Tao & Xu, Yiming & Pan, Jianfeng, 2017. "Combustion characteristics of premixed propane/hydrogen/air in the micro-planar combustor with different channel-heights," Applied Energy, Elsevier, vol. 203(C), pages 635-642.
    5. Baigmohammadi, Mohammadreza & Tabejamaat, Sadegh & Zarvandi, Jalal, 2015. "Numerical study of the behavior of methane-hydrogen/air pre-mixed flame in a micro reactor equipped with catalytic segmented bluff body," Energy, Elsevier, vol. 85(C), pages 117-144.
    6. Rana, Uttam & Chakraborty, Suman & Som, S.K., 2014. "Thermodynamics of premixed combustion in a heat recirculating micro combustor," Energy, Elsevier, vol. 68(C), pages 510-518.
    7. Wan, Jianlong & Zhao, Haibo, 2017. "Dynamics of premixed CH4/air flames in a micro combustor with a plate flame holder and preheating channels," Energy, Elsevier, vol. 139(C), pages 366-379.
    8. Cai, Tao & Tang, Aikun & Zhao, Dan & Zhou, Chen & Huang, Qiuhan, 2020. "Flame dynamics and stability of premixed methane/air in micro-planar quartz combustors," Energy, Elsevier, vol. 193(C).
    9. Li, Yueh-Heng & Chen, Guan-Bang & Cheng, Tsarng-Sheng & Yeh, Yean-Ling & Chao, Yei-Chin, 2013. "Combustion characteristics of a small-scale combustor with a percolated platinum emitter tube for thermophotovoltaics," Energy, Elsevier, vol. 61(C), pages 150-157.
    10. 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.
    11. Baigmohammadi, Mohammadreza & Sarrafan Sadeghi, Soroush & Tabejamaat, Sadegh & Zarvandi, Jalal, 2013. "Numerical study of the effects of wire insertion on CH4(methane)/AIR pre-mixed flame in a micro combustor," Energy, Elsevier, vol. 54(C), pages 271-284.
    12. E, Jiaqiang & Luo, Bo & Han, Dandan & Chen, Jingwei & Liao, Gaoliang & Zhang, Feng & Ding, Jiangjun, 2022. "A comprehensive review on performance improvement of micro energy mechanical system: Heat transfer, micro combustion and energy conversion," Energy, Elsevier, vol. 239(PE).
    13. Veeraragavan, Ananthanarayanan, 2015. "On flame propagation in narrow channels with enhanced wall thermal conduction," Energy, Elsevier, vol. 93(P1), pages 631-640.
    14. Alipoor, Alireza & Mazaheri, Kiumars, 2014. "Studying the repetitive extinction-ignition dynamics for lean premixed hydrogen-air combustion in a heated microchannel," Energy, Elsevier, vol. 73(C), pages 367-379.

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    More about this item

    Keywords

    Micro-tube; Step; CH4; Air; Hydrogen; Numerical study;
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