Effects of partial premixing on pollutant emissions in swirling methane jet flames

T. S. Cheng, Y. C. Chao, D. C. Wu, H. W. Hsu, T. Yuan

研究成果: Article同行評審

29 引文 斯高帕斯(Scopus)

摘要

Experimental measurements of visible flame heights, temperatures, and pollutant emission indices in partially premixed swirling flames with a broad range of central fuel tube equivalence ratios (ΦF) are reported. Two cases of partially premixed swirling flames are studied; one with a constant fuel tube exit velocity and the other with an increased exit velocity. With increasing partial premixing, the visible flame height decreases and the overall flame color changes from yellow to blue. Temperature measurements indicate that the flame structures become thinner and temperatures increase continuously with increasing partial premixing. Emission index, EINOx and EICO, values decrease with increasing levels of partial premixing and reach a minimum value at ΦF ≈ 3, followed by an increase as ΦF approaches the blowoff limits. The reduction in EINOx and EICO at optimum partial premixing (ΦF ≈ 3), as compared with that for the non-premixed swirling flame is at least 23% and 77%, respectively. The emission index for NOx scales very well with the fuel mass fraction and the fuel-air momentum flux ratio. Good agreement is achieved between the predictions and measured results.

原文English
頁(從 - 到)865-878
頁數14
期刊Combustion and Flame
125
發行號1-2
DOIs
出版狀態Published - 2001

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 化學工程 (全部)
  • 燃料技術
  • 能源工程與電力技術
  • 物理與天文學 (全部)

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