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Computation and measurement for distributions of temperature and soot volume fraction in diffusion flames

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Abstract

A combined computational and experimental investigation to examine temperature and soot volume fraction in coflow ethylene-air diffusion flames was presented. A numerical simulation was conducted by using a relatively detailed gas-phase chemistry and complex thermal and transport properties coupled with a semi-empirical two-equation soot model. Thermal radiation was calculated using the discrete ordinates method. An image processing technique and a decoupled reconstruction method were used to simultaneously measure the distributions of temperature and soot volume fraction. The results show that the maximum error for temperature does not exceed 10% between the prediction and the measurement. And the maximum error is 6.9% for soot volume fraction between prediction and measurement. Additional simulations were performed to explore the effects of global equivalence ratio on diffusion flames and the soot formation. The results display that the soot formation increases with decreasing the coflow air velocity. And the soot formation in each case appears in the annular region, where the temperature ranges from about 1 000 K to 2 000 K and the profile becomes taller and wider when the coflow air is decreased.

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Authors and Affiliations

  1. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074, China

    Yin-di Zhang  (张引弟), Chun Lou  (娄春), Ming-liang Xie  (谢明亮), Qing-yan Fang  (方庆艳) & Huai-chun Zhou  (周怀春)

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  1. Yin-di Zhang  (张引弟)
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  2. Chun Lou  (娄春)
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  3. Ming-liang Xie  (谢明亮)
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  4. Qing-yan Fang  (方庆艳)
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  5. Huai-chun Zhou  (周怀春)
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Corresponding author

Correspondence to Huai-chun Zhou  (周怀春).

Additional information

Foundation item: Projects(50806024, 50806023 and 50806026) supported by the National Natural Science Foundation of China

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Zhang, Yd., Lou, C., Xie, Ml. et al. Computation and measurement for distributions of temperature and soot volume fraction in diffusion flames. J. Cent. South Univ. Technol. 18, 1263–1271 (2011). https://doi.org/10.1007/s11771-011-0831-2

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  • DOI: https://doi.org/10.1007/s11771-011-0831-2

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