期刊
CHEMICAL ENGINEERING JOURNAL
卷 143, 期 1-3, 页码 230-235出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2008.04.011
关键词
combustion; fractals; multiphase reactors; turbulence; entrained-flow gasifier; flame; multifractal detrended fluctuation analysis
资金
- National Basic Research Program of China [2004CB217703]
- PCSIRT [IRT0620]
- New Century Excellent Talents in University [NCET-05-0413, NCET-07-0288]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
On a laboratory-scale testing platform of an impinging entrained-flow gasifier with four opposed burners, the flame images for diesel combustion and gasification process were recorded with a single charge coupled device (CCD) camera. The two-dimensional multifractal detrended fluctuation analysis was employed to investigate the multifractal nature of the flame images. Sound power-law scaling relations in the annealed average of detrended fluctuations were unveiled when the order q > 0, and the multifractal feature of flame images was confirmed. Further analyses identified two multifractal parameters, the minimum and maximum singularities alpha(min) and alpha(max) serving as characteristic parameters of the multifractal flames. These two characteristic multifractal parameters vary with respect to different experimental conditions. (c) 2008 Elsevier B.V. All rights reserved.
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