Laminar Flame Instability of n-Hexane, n-Octane, and n-Decane in Spherical Expanding Flames

  • YIN Geyuan ,
  • HU Erjiang ,
  • LI Xiaotian ,
  • LV Xin ,
  • HUANG Zuohua
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  • 1. State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
    2. United Automotive Electronic Systems Co., Ltd, Shanghai 201206, China
    3. Chongqing Changan Automobile Co., Ltd., Chongqing 401120, China

Online published: 2024-04-30

Supported by

This study is supported by the National Natural Science Foundation of China (52106182, 51888103), the National Science and Technology Major Project (2019-III-0018-0062). It is also supported by the State Key Laboratory of Clean Energy Utilization (Open Fund Project No. ZJUCEU2021016) and Shaanxi Nature Science Foundation (No. 2021JQ-265).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024

Abstract

This paper focuses on the laminar flame instability of three high molecular weight n-alkanes, namely n-hexane, n-octane, and n-decane. The experiment was carried out in a constant volume combustion bomb to get the flame images. The critical radius under different conditions was extracted using the image processing program. Combined with the existing critical Peclet number theory, the dominant factors of flame instability under current conditions for three n-alkanes can be figured out. Moreover, the average cell size (equivalent cell radius, Rcell) was extracted to provide quantitative analysis of the flame cellular structure, based on the method developed in this work. The theoretical Rcell were also calculated and compared with the experimental results to validate the proposed method.

Cite this article

YIN Geyuan , HU Erjiang , LI Xiaotian , LV Xin , HUANG Zuohua . Laminar Flame Instability of n-Hexane, n-Octane, and n-Decane in Spherical Expanding Flames[J]. Journal of Thermal Science, 2024 , 33(3) : 1189 -1199 . DOI: 10.1007/s11630-024-1844-0

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