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Measurement of Soot Volume Fraction and Temperature for Oxygen-Enriched Ethylene Combustion Based on Flame Image Processing

Author

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  • Weijie Yan

    (School of Electrical and Power Engineering, China University of Mining and Technology, No. 1, Daxue Road, Xuzhou 221116, China
    Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, No. 1, Daxue Road, Xuzhou 221116, China)

  • Dongmei Chen

    (Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, No. 1, Daxue Road, Xuzhou 221116, China)

  • Zuomei Yang

    (Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, No. 1, Daxue Road, Xuzhou 221116, China)

  • Enyu Yan

    (Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, No. 1, Daxue Road, Xuzhou 221116, China)

  • Peitao Zhao

    (Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, No. 1, Daxue Road, Xuzhou 221116, China)

Abstract

A method for simultaneously visualizing the two-dimensional distributions of temperature and soot volume fraction in an ethylene flame was presented. A single-color charge-coupled device (CCD) camera was used to capture the flame image in the visible spectrum considering the broad-response spectrum of the R and G bands of the camera. The directional emissive power of the R and G bands were calibrated and used for measurement. Slightly increased temperatures and reduced soot concentration were predicted in the central flame without self-absorption effects considered, an iterative algorithm was used for eliminating the effect of self-absorption. Nine different cases were presented in the experiment to demonstrate the effects of fuel mass flow rate and oxygen concentration on temperature and soot concentration in three different atmospheres. For ethylene combustion in pure-air atmosphere, as the fuel mass flow rate increased, the maximum temperature slightly decreased, and the maximum soot volume fraction slightly increased. For oxygen fractions of 30%, 40%, and 50% combustion in O 2 /N 2 oxygen-enhanced atmospheres, the maximum flame temperatures were 2276, 2451, and 2678 K, whereas combustion in O 2 /CO 2 atmospheres were 1916, 2322, and 2535 K. The maximum soot volume fractions were 4.5, 7.0, and 9.5 ppm in oxygen-enriched O 2 /N 2 atmosphere and 13.6, 15.3, and 14.8 ppm in oxygen-enriched O 2 /CO 2 atmosphere. Compared with the O 2 /CO 2 atmosphere, combustion in the oxygen-enriched O 2 /N 2 atmosphere produced higher flame temperature and larger soot volume fraction. Preliminary results indicated that this technique is reliable and can be used for combustion diagnosis.

Suggested Citation

  • Weijie Yan & Dongmei Chen & Zuomei Yang & Enyu Yan & Peitao Zhao, 2017. "Measurement of Soot Volume Fraction and Temperature for Oxygen-Enriched Ethylene Combustion Based on Flame Image Processing," Energies, MDPI, vol. 10(6), pages 1-16, May.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:6:p:750-:d:99864
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    References listed on IDEAS

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    1. Draper, Teri Snow & Zeltner, Darrel & Tree, Dale R. & Xue, Yuan & Tsiava, Remi, 2012. "Two-dimensional flame temperature and emissivity measurements of pulverized oxy-coal flames," Applied Energy, Elsevier, vol. 95(C), pages 38-44.
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    Cited by:

    1. Junyi Lin & Xiangyu Zhang & Kaiyun Liu & Wenjie Zhang, 2019. "Emissivity Characteristics of Hydrocarbon Flame and Temperature Measurement by Color Image Processing," Energies, MDPI, vol. 12(11), pages 1-14, June.
    2. Weijie Yan & Yunqi Ya & Feng Du & Hao Shao & Peitao Zhao, 2017. "Spectrometer-Based Line-of-Sight Temperature Measurements during Alkali-Pulverized Coal Combustion in a Power Station Boiler," Energies, MDPI, vol. 10(9), pages 1-14, September.
    3. Wei Wang & Dong Liu & Yaoyao Ying & Guannan Liu & Ye Wu, 2017. "On the Response of Nascent Soot Nanostructure and Oxidative Reactivity to Photoflash Exposure," Energies, MDPI, vol. 10(7), pages 1-11, July.

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