Effect of Permanent Magnetic Field on Premixed CH4 Flames

  • Muhammad BILAL ,
  • Bipro GAIN ,
  • Kairu JIN ,
  • Zhenyu TIAN
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  • 1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
    3. State Key Laboratory of Long Term Energy Storage, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China

Online published: 2025-05-06

Supported by

The authors are grateful for the financial support from the National Natural Science Foundation of China (No. 52325604), National NSFC Ordered Synthesis and Low-Carbon Clean Combustion of Sustainable Aviation Fuels (SAF) (No. W2412101), MOST (2022YFB4003900/ 2021YFA0716200), National Science and Technology Major Project (J2019-III-0005-0048) and the Space Application System of China Manned Space Program.

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2025

Abstract

This study quantitatively examines the impact of magnetic fields on methane flame characteristics, specifically analyzing changes in flame height, width, and velocity. Using flame photography and Particle Image Velocimetry (PIV), the effects of varying magnetic field strengths (ranging from 25 to 45 mT) on flame behavior were measured across equivalence ratios (φ) from 0.8 to 2.0. The results reveal that applying a magnetic field increases flame height by up to 6.75% while reducing flame width by approximately 6% under a field strength of 45 mT at φ=2.0. Additionally, PIV data demonstrate a significant increase in upward flame velocity, with an observed enhancement of 20% at higher magnetic field intensities. The gradient magnetic field was found to reduce flame distortion, leading to a smoother flame profile. Compared to the control group (M0, with no magnetic field), these findings confirm that magnetic fields can effectively adjust flame properties. This study underscores the potential of magnetic fields in optimizing combustion processes.

Cite this article

Muhammad BILAL , Bipro GAIN , Kairu JIN , Zhenyu TIAN . Effect of Permanent Magnetic Field on Premixed CH4 Flames[J]. Journal of Thermal Science, 2025 , 34(3) : 771 -779 . DOI: 10.1007/s11630-025-2134-1

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