Calibration of an RGB, CCD Camera and Interpretation of its Two-Color Images for KL and Temperature

Svensson, Kenth; Mackrory, Andrew J.; Richards, Michael J.; Tree, Dale R.

doi:10.4271/2005-01-0648

Cited by 46 publications

(49 citation statements)

References 38 publications

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“…When this happens, it is not possible to obtain a value of K2CL 259 for such pixels and maximum K2CL = 3 is assigned. A similar heterogeneous distribution was 260 previously reported by other authors [21,26,27]. Svensson et al [21] suggest that the 261 heterogeneity is real and not caused by uncertainty sources.…”

supporting

confidence: 65%

“…A similar heterogeneous distribution was 260 previously reported by other authors [21,26,27]. Svensson et al [21] suggest that the 261 heterogeneity is real and not caused by uncertainty sources. However, Payri et al [22] conclude 262 that their influence is not negligible, leading to variations of K2CL up to 20%.…”

supporting

confidence: 65%

“…For that purpose, KL values (optical thickness) have been chosen as metrics of soot 299 measurements [6,30,31,35]. In this sense, a discussion regarding soot optical properties is 300 avoided.…”

mentioning

confidence: 99%

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Application of optical diagnostics to the quantification of soot in n-alkane flames under diesel conditions

Pastor

García-Oliver

García

et al. 2016

Combustion and Flame

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Mico Reche, C. (2016). Application of optical diagnostics to the quantification of soot in n-alkane flames under diesel conditions. Combustion and Flame. 164:212-223. doi:10.1016/j.combustflame.2015.11.018. Nevertheless, it could still be a good option for low sooting conditions. On the other hand, an 36 attempt to calibrate LII signal by means of LEM measurements has been reported. This approach 37 should make it possible to obtain additional information on the soot spatial distribution. 38 However, inconsistencies have been identified which stem from the inherent limitations of LII 39 technique in highly sooting conditions. 40 Application of optical diagnostics to the quantification of soot in

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supporting

confidence: 65%

supporting

confidence: 65%

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Application of optical diagnostics to the quantification of soot in n-alkane flames under diesel conditions

Pastor

García-Oliver

García

et al. 2016

Combustion and Flame

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“…Svensson et al described a two-color imaging technique using a color CCD camera to measure spatially resolved soot temperature and f v L in an n-heptane diesel jet in an optically accessible constant-volume combustion vessel [35]. For an in-cylinder environment similar to the HTC condition of the current study, they reported instantaneous 2-dimensional maps of soot f v L and temperature for their jet.…”

Section: Signal-averaging Errormentioning

confidence: 83%

Gradient effects on two-color soot optical pyrometry in a heavy-duty DI diesel engine

Musculus

Singh

Reitz

2008

Combustion and Flame

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“…The camera system used was a 10-bit RGB CCD camera, the same system described and analyzed in detail by Svensson et al 17 Surface temperature was calculated from the images using a broadband two-color method with an assumption of gray emissivity. The camera was fitted with two IR filters to ensure only visible radiation was detected.…”

Section: Experimental Methodsmentioning

confidence: 99%

Surface temperature and time‐dependent measurements of black liquor droplet combustion

Baxter

Mackrory

et al. 2008

AIChE Journal

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in Wiley InterScience (www.interscience.wiley.com).Black liquor droplets, initially 1-3 mm in diameter, were burned while simultaneously measuring surface and internal temperature, mass loss, and diameter to gain insight into the physical processes of single droplet combustion. Data were collected by weighing a droplet hanging on a thermocouple wire within a heated furnace. Two-color images of the droplet were obtained to determine a surface temperature and particle size. The data suggest that models of droplet combustion should treat drying, devolatilization, and char oxidation as occurring simultaneously, though typically in different regions of the particle. Isothermal models should be avoided as temperature differences in excess of 300 K exist between the surface and interior, with larger gradients along the surface. Droplet swelling increased at lower ambient temperatures, and is greater for softwood than hardwood liquors. Additional unidentified factors also influence swelling, meaning it is still highly unpredictable and may be a function of initial droplet shape, size, and chemical composition.

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Calibration of an RGB, CCD Camera and Interpretation of its Two-Color Images for KL and Temperature

Cited by 46 publications

References 38 publications

Application of optical diagnostics to the quantification of soot in n-alkane flames under diesel conditions

Application of optical diagnostics to the quantification of soot in n-alkane flames under diesel conditions

Gradient effects on two-color soot optical pyrometry in a heavy-duty DI diesel engine

Surface temperature and time‐dependent measurements of black liquor droplet combustion

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