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

网络出版日期: 2025-10-29

基金资助

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).

版权

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

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
Expand
  • 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

摘要

本文提出了一种新的光学方法,用于确定预混稳定滞止火焰中碳烟生成转捩点,并应用该方法研究了不同高度滞止板对碳烟生成转捩点的影响。该方法通过处理火焰图像相关区域的像素值来量化碳烟的生成。在一系列从无碳烟火焰到富碳烟火焰的连续工况下,通过量化后的碳烟生成量来确定碳烟生成转捩点。结果表明,这种方法能有效捕捉碳烟生成转捩点。对不同 HAB 下的碳烟生成转捩点进行比较后发现,当 HAB 小于 10 mm 时,滞止板对碳烟生成有抑制作用,碳烟生成转捩点所需的当量比随着 HAB 的减小而增大。当 HAB 大于 10 毫米时,滞止板不再影响碳烟生成转捩点。

本文引用格式

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]. 热科学学报, 2025 , 34(6) : 2167 -2176 . DOI: 10.1007/s11630-025-2169-3

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.

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