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Effect of Burner Wall Material on Microjet Hydrogen Diffusion Flames near Extinction: A Numerical Study

Author

Listed:
  • Aravind Muraleedharan

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

  • Jithin Edacheri Veetil

    (Department of Mechanical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India)

  • Akram Mohammad

    (Department of Aerospace Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia)

  • Sudarshan Kumar

    (Department of Aerospace Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India)

  • Ratna Kishore Velamati

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

Abstract

Characteristics of microjet hydrogen diffusion flames stabilized near extinction are investigated numerically. Two-dimensional simulations are carried out using a detailed reaction mechanism. The effect of burner wall material, thickness, and thermal radiation on flame characteristics such as flame height and maximum flame temperature are studied. Results show that the flame stabilizes at lower fuel jet velocities for quartz burner than steel or aluminum. Higher flame temperatures are observed for low conductive burners, whereas the flame length increases with an increase in thermal conductivity of the burner. Even though thermal radiation has a minor effect on flame characteristics like flame temperature and flame height, it significantly influences the flame structure for low conductive burner materials. The burner tip and its vicinity are substantially heated for low conductive burners. The effect of burner wall thickness on flame height is significant, whereas it has a more negligible effect on maximum flame temperature. Variation in wall thickness also affects the distribution of H and HO 2 radicals in the flame region. Although the variation in wall thickness has the least effect on the overall flame shape and temperature distribution, the structure near the burner port differs.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:24:p:8266-:d:697794
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    References listed on IDEAS

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    1. Nair, Aswathy & Velamati, Ratna Kishore & Kumar, Sudarshan, 2016. "Effect OF CO2/N2 dilution on laminar burning velocity of liquid petroleum gas-air mixtures at elevated temperatures," Energy, Elsevier, vol. 100(C), pages 145-153.
    2. Chou, S.K. & Yang, W.M. & Chua, K.J. & Li, J. & Zhang, K.L., 2011. "Development of micro power generators - A review," Applied Energy, Elsevier, vol. 88(1), pages 1-16, January.
    3. Junjie Hong & Ming Zhao & Lei Liu & Qiuxiang Shi & Xi Xiao & Aiwu Fan, 2021. "Improvement of the Combustion Completeness of Hydrogen Jet Flames within a Mesoscale Tube under Zero Gravity," Energies, MDPI, vol. 14(15), pages 1-12, July.
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    Cited by:

    1. 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.
    2. Ruslan V. Fedorov & Dmitry A. Generalov & Vyacheslav V. Sherkunov & Valeriy V. Sapunov & Sergey V. Busygin, 2023. "Improving the Efficiency of Fuel Combustion with the Use of Various Designs of Embrasures," Energies, MDPI, vol. 16(11), pages 1-15, May.

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