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- W3012196749 endingPage "117545" @default.
- W3012196749 startingPage "117545" @default.
- W3012196749 abstract "To understand the potential role that the diameter of a burner plays in flame structure and flame instability, the influence of burner diameter on the turbulent premixed flame structure was investigated in two Bunsen-type burners. The nozzle inner diameters were 8 and 10 mm, Reynolds numbers were 2200, 3300, and 4400, equivalence ratios ranged from 0.8 to 1.2, and velocity fluctuations were varied by using two turbulence generation systems. The normalized flame edge length, local curvature of flame, and skewness of the flame curvatures were derived from Mie scatter images. Results showed that when the Reynolds number was small, the flames were smooth and the skewness of the flame curvatures was close to 0. When the Reynolds number was increasing to a turning point, the flames became wrinkled, and the skewness of the flame curvatures continued to decrease to negative. The turning point in the experiment with burner diameter of 10 mm was smaller than that in the other experiments. To measure the influence of burner diameter, a wavelet analysis was applied. An index was proposed to quantify the boundary conditions from the wavelet energy distribution. The index was observed to be negatively correlated with the skewness of the flame curvatures. In summary, the flame wrinkled easily with increasing burner diameter, and the wavelet energy distribution of inflow velocity may provide a way to judge the influence of the diameter." @default.
- W3012196749 created "2020-03-23" @default.
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- W3012196749 date "2020-07-01" @default.
- W3012196749 modified "2023-09-26" @default.
- W3012196749 title "Effect of burner diameter on structure and instability of turbulent premixed flames" @default.
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- W3012196749 doi "https://doi.org/10.1016/j.fuel.2020.117545" @default.
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