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- Title
Experimental and theoretical analysis on ethylene rectangular jet flame behavior and flame radiation with different aspect ratios.
- Authors
Bi, Yubo; Wang, Jiaqi; Liu, Haidong; Huang, Shenshi; Lu, Shouxiang; Yang, Zhian; Cong, Haiyong; Ye, Lili; Bi, Mingshu
- Abstract
In this paper, the combustion characteristics of rectangular ethylene jet flame were experimentally investigated under different flow rates and nozzle aspect ratios. The nozzle exit area was kept at 250 mm2 with five aspect ratios as 1, 2, 4, 8 and 10, respectively. Six ethylene flow rates were used from 0.12 to 2.00 L min−1. The results show that the flame height increases with the decreasing aspect ratio whether the flame is laminar, flickering or turbulent. The dependence of flame oscillation frequency on aspect ratio is similar to flame height. With the increase of aspect ratio, both the flame height and the flame oscillation frequency decrease. The change of radiation heat flux with aspect ratio varies with ethylene flow rate. When the flow rate is 0.12, 0.16 and 0.20 L min−1, the ethylene radiant heat flux decreases with the increase of aspect ratio. The trend is opposite with ethylene flow rate higher than 0.50 L min−1. The prediction correlations of flame height, flame oscillation frequency and radiant fraction are derived based on scale analysis. The correlations agree well with experimental data in the current and previous studies.
- Subjects
ETHYLENE; FREQUENCIES of oscillating systems; FLAME; RADIATION; HEAT flux; HEAT radiation &; absorption
- Publication
Journal of Thermal Analysis & Calorimetry, 2024, Vol 149, Issue 2, p585
- ISSN
1388-6150
- Publication type
Article
- DOI
10.1007/s10973-023-12661-9