Optical Measurement of Sooting Limits for Ethylene Premixed Burner-Stabilized Stagnation Flames

  • REN Hang ,
  • YING Yaoyao ,
  • YU Runtian ,
  • SU Zhiwei ,
  • YANG Kaixuan ,
  • CHEN Mingxiao ,
  • QI Dandan ,
  • LIU Dong
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  • 1. MIIT Key Laboratory of Thermal Control of Electronic Equipment, Ministry of Industry and Information Technology, Nanjing University of Science and Technology, Nanjing 210094, China
    2. Advanced Combustion Laboratory, School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

Online published: 2025-10-29

Supported by

This work is supported by the National Natural Science Foundation of China (No. 52076110, No. 52376115, and No. 52106160), and the Fundamental Research Funds for the Central Universities (No. 30924010924).

Copyright

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

Abstract

An optical method is developed for determining the sooting limit in premixed burner-stabilized stagnation flame. The impact of a stagnant plate at varying heights above burner (HAB) on the sooting limit is investigated using the method. The method quantifies the soot generation by processing pixel values in the region of interest of flame images. In a series of consecutive conditions from soot-free flame to soot-rich flame, the sooting limit is identified by observing the occurrence of soot formation. Experimental results demonstrate that this method could effectively capture the sooting limit. A comparison of the sooting limit at different HABs reveals that when the HAB is lower than 10 mm, the stagnant plate has an inhibitory effect on soot generation, and the equivalence ratio required for the sooting limit increases as the HAB decreases. When the HAB is higher than 10 mm, the stagnant plate ceases to impact the sooting limit.

Cite this article

REN Hang , YING Yaoyao , YU Runtian , SU Zhiwei , YANG Kaixuan , CHEN Mingxiao , QI Dandan , LIU Dong . Optical Measurement of Sooting Limits for Ethylene Premixed Burner-Stabilized Stagnation Flames[J]. Journal of Thermal Science, 2025 , 34(6) : 2167 -2176 . DOI: 10.1007/s11630-025-2169-3

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