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An experimental study on flame stability and pollutant emission in a cyclone jet hybrid combustor

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  • Hwang, Cheol-Hong
  • Lee, Seungro
  • Kim, Jong-Hyun
  • Lee, Chang-Eon

Abstract

The combustion characteristics of a cyclone jet hybrid combustor using a combination of swirling premixed and jet diffusion flames were experimentally investigated to achieve high flame stability and low pollutant emissions. Two kinds of combustion modes were examined: the diffusion combustion (DC) mode, which consists of swirling air flow and jet diffusion flame, and the hybrid combustion (HC) mode, which consists of swirling premixed and jet diffusion flames. In the HC mode, the effects of fuel nozzle geometry on fuel-air mixing were investigated in terms of flame stability and pollutant emissions. The results showed that the HC mode can significantly reduce soot, CO, and NOx emissions in a stable flame region compared to the DC mode. However, CO emission in the HC mode increases drastically when overall equivalence ratios drop below 0.75. By modifying the fuel nozzle for the jet diffusion flame, it was found that increases in fuel-air mixing using the improved nozzle provide a stable flame region approximately twice as wide as that of the fuel nozzle using a single hole. In addition, a multi-hole fuel nozzle shows a NOx reduction of 55% compared to that of the DC mode.

Suggested Citation

  • Hwang, Cheol-Hong & Lee, Seungro & Kim, Jong-Hyun & Lee, Chang-Eon, 2009. "An experimental study on flame stability and pollutant emission in a cyclone jet hybrid combustor," Applied Energy, Elsevier, vol. 86(7-8), pages 1154-1161, July.
    • Handle: RePEc:eee:appene:v:86:y:2009:i:7-8:p:1154-1161
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    Cited by:

    1. Zhu, Shujun & Hui, Jicheng & Lyu, Qinggang & Ouyang, Ziqu & Zeng, Xiongwei & Zhu, Jianguo & Liu, Jingzhang & Cao, Xiaoyang & Zhang, Xiaoyu & Ding, Hongliang & Liu, Yuhua, 2023. "Experimental study on pulverized coal swirl-opposed combustion preheated by a circulating fluidized bed. Part A. Wide-load operation and low-NOx emission characteristics," Energy, Elsevier, vol. 284(C).
    2. Chen, Junghui & Hsu, Tong-Yang & Chen, Chih-Chien & Cheng, Yi-Cheng, 2010. "Monitoring combustion systems using HMM probabilistic reasoning in dynamic flame images," Applied Energy, Elsevier, vol. 87(7), pages 2169-2179, July.
    3. Chen, Junghui & Chan, Lester Lik Teck & Cheng, Yi-Cheng, 2013. "Gaussian process regression based optimal design of combustion systems using flame images," Applied Energy, Elsevier, vol. 111(C), pages 153-160.
    4. González-Cencerrado, A. & Peña, B. & Gil, A., 2012. "Coal flame characterization by means of digital image processing in a semi-industrial scale PF swirl burner," Applied Energy, Elsevier, vol. 94(C), pages 375-384.

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