Infrared Imagery Applied to A Large Buoyant Plume

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  • a Département des Sciences de l'Atmosphère, Université Paul Sabatier, 31000 Toulouse, France
  • | b Observatoire du Puy de Dôme, Centre de Recherches Atmosphériques, 65300 Lannemezan, France
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Abstract

The possibility of applying infrared imagery to the study of a large, hot plume materialized by carbon particles resulting from the incomplete combustion of fuel oil is investigated.

In a specific case (the PROSERPINE experiment), due to the high carbon particle content, the lower part of the plume acts as a semi-opaque target. Using an infrared camera equipped with a detector sensitive in the 2–5.8 μm band, the thermal images are found to yield a plume geometry in good agreement with visible contours retrieved from visible photographs.

Thermal images provide access to the internal structure of a plume, down to scales which depend on the plume opacity. It appears that IR imagery is able to yield improved information concerning the turbulent fields of motion and temperature.

Abstract

The possibility of applying infrared imagery to the study of a large, hot plume materialized by carbon particles resulting from the incomplete combustion of fuel oil is investigated.

In a specific case (the PROSERPINE experiment), due to the high carbon particle content, the lower part of the plume acts as a semi-opaque target. Using an infrared camera equipped with a detector sensitive in the 2–5.8 μm band, the thermal images are found to yield a plume geometry in good agreement with visible contours retrieved from visible photographs.

Thermal images provide access to the internal structure of a plume, down to scales which depend on the plume opacity. It appears that IR imagery is able to yield improved information concerning the turbulent fields of motion and temperature.

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