Abstract
ABSTRACTIn this research, the effects of nitrogen, carbon dioxide, and steam diluents on the two-dimensional temperature structures and characteristics of syngas flames were investigated by two-line planar laser-induced fluorescence thermometry. The spatial resolution and the total uncertainty of the measured results were 41.7 µm and ±8.45%, respectively. The experimental results demonstrated that diluting with carbon dioxide in the syngas flame resulted in the lowest flame temperature, followed by steam diluent. The measured temperature fields for these three diluents exhibited a symmetrical but nonuniform structure. It was found that the high-temperature region exists in the downstream of flame front, and the temperature decreases gradually inside-out in the burned zone of syngas flame. The findings in this work will improve our understanding of the temperature characteristics for the syngas flames with different diluents.
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