2019
DOI: 10.1016/j.proci.2018.05.115
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Thermal structure of the blue whirl

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Cited by 29 publications
(25 citation statements)
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“…The experimental apparatus ( Fig. 4), similar to that used in previous work [5,7,8,20], consisted of two quartz half-cylinders (310 mm in diameter, 600 mm in height) suspended on an aluminum frame. The two quartz pieces were positioned over a water pan and offset from each other, forming gaps for natural entrainment of air.…”
Section: Experimental Methodsmentioning
confidence: 99%
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“…The experimental apparatus ( Fig. 4), similar to that used in previous work [5,7,8,20], consisted of two quartz half-cylinders (310 mm in diameter, 600 mm in height) suspended on an aluminum frame. The two quartz pieces were positioned over a water pan and offset from each other, forming gaps for natural entrainment of air.…”
Section: Experimental Methodsmentioning
confidence: 99%
“…In addition, a blue whirl can be formed from a variety of different liquid hydrocarbon fuels. Experimental measurements show that it has peak temperatures of about 2000 K [20][21][22] and can also be formed on other types of smooth surfaces such as metals [8]. There is intense combustion in the bright blue ring, as evidenced by high concentrations of OH, OH*, and CH* radicals in this region [8,21].…”
Section: Introductionmentioning
confidence: 99%
“…The filament intensity as a function of location was determined using the grayscale values of the sum of seven pixels perpendicular to the filament following Ref. [5]. Calibration of the thin filament pyrometry measurement is described below.…”
Section: Sic Filamentsmentioning
confidence: 99%
“…The red, green, and blue (RGB) pixel intensities were extracted from the images and converted to grayscale as a weighted average of RGB values equal to (0.2989R + 0.5870G + 0.1140B) following Ref. [5]. Experiments collected 120 s of 29.97 Hz video at 4K Ultra High Definition (a frame size of 2840 x 2160 pixels) and 3400 frames were used in the analysis.…”
Section: Cameramentioning
confidence: 99%
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