<b>Radiation Measurements in Kerosene Pool Flames </b><b>Using High-Speed Thermography </b>

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  • <b>サーマルカメラによる灯油プール火災の放射熱計測</b>
  • サーマルカメラによる灯油プール火災の放射熱計測
  • サーマル カメラ ニ ヨル トウユ プール カサイ ノ ホウシャ ネツ ケイソ

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Abstract

<p><tt>Detalls of apparent temperature distributions in large ~c~le kerosene pool flames in a 2.7m square tank were measured by high-speed thermography which stores a thermal image in the form of a thermal TV color image with 25 60O data points every 0.05 seconds. The apparent temperature image can be changed to irradiance by sirnple approximations. </tt><tt>The irradiance of the data (2 cases and 140 images) was compared with that of a wide angle thermopile radiometerto verify the data from the thermography A series of data recarded at intervals of 1 and 5 seconds were also analyzed to obtain the radiance distribution in the flame The analysis allows the following conclusions : lrradiance values obtained by high-speed therrno graphy are not very different from those of a conventional wide angle thermopile </tt><tt>radiometer. The high radiance zone which ordinary cameras do not shaw was determined by the average vaIL~e of each of 70 apparent temperature images and the center of the high radiance zone is located at about 0.3D (D is the tank diameter) The moderately high apparent temperature </tt><tt>range of 1323-1448K apparently has a strong influence on the irradiance of pool flames.</tt></p>

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