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Impact of H 2 Blending of Methane on Micro-Diffusion Combustion in a Planar Micro-Combustor with Splitter

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  • Sreejith Sudarsanan

    (Department of Mechanical Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore 641112, India)

  • Ratna Kishore Velamati

    (Department of Mechanical Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore 641112, India)

  • Awad B. S. Alquaity

    (Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
    Center for Hydrogen and Energy Storage, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia)

  • Prabhu Selvaraj

    (Department of Mechanical Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore 641112, India)

Abstract

An investigation into the non-premixed combustion characteristics of methane in a planar micro-combustor with a splitter was performed. The impact of blending methane with hydrogen on these characteristics was also analyzed. Additionally, the effects of inlet velocity and global equivalence ratio on flame location, flame temperature, combustion efficiency and outer wall temperature were studied for three different fuel compositions: pure methane (MH0), 60% methane with 40% hydrogen (MH40), and 40% methane with 60% hydrogen (MH60)). A heat recirculation analysis of the combustor wall was conducted to determine the amount of heat recirculated into the unburnt gas at various inlet velocities for all three fuel compositions. The results demonstrated that the stability limit of methane in terms of inlet velocity (1–2 m/s) and global equivalence ratio (1.0–1.2) was significantly enhanced to 1–3 m/s and 0.8–1.2, respectively, with the addition of hydrogen. At an inlet velocity of 2 m/s, the flame location of 3.6 mm for MH0 was significantly improved to 2.2 mm for MH60. Additionally, outer wall temperature exhibited a rise of 100 K for MH60 compared to MH0. Furthermore, from heat recirculation analysis, when the ratio of heat recirculated to heat loss exceeded unity, the flame started exhibiting the lift-off phenomenon for all the fuel compositions.

Suggested Citation

  • Sreejith Sudarsanan & Ratna Kishore Velamati & Awad B. S. Alquaity & Prabhu Selvaraj, 2024. "Impact of H 2 Blending of Methane on Micro-Diffusion Combustion in a Planar Micro-Combustor with Splitter," Energies, MDPI, vol. 17(4), pages 1-22, February.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:4:p:970-:d:1341501
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    References listed on IDEAS

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    1. Vinay Sankar & Sreejith Sudarsanan & Sudipto Mukhopadhyay & Prabhu Selvaraj & Aravind Balakrishnan & Ratna Kishore Velamati, 2023. "Towards the Development of Miniature Scale Liquid Fuel Combustors for Power Generation Application—A Review," Energies, MDPI, vol. 16(10), pages 1-41, May.
    2. 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).
    3. 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.
    4. Aravind Muraleedharan & Jithin Edacheri Veetil & Akram Mohammad & Sudarshan Kumar & Ratna Kishore Velamati, 2021. "Effect of Burner Wall Material on Microjet Hydrogen Diffusion Flames near Extinction: A Numerical Study," Energies, MDPI, vol. 14(24), pages 1-24, December.
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