室内火災の熱放射評価に対する温度変動の影響

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書誌事項

タイトル別名
  • Effects of Temperature Fluctuations on the Evaluations of Radiative Heat Flux in a Room Fire
  • シツナイ カサイ ノ ネツ ホウシャ ヒョウカ ニ タイスル オンド ヘンドウ

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説明

For more exact evaluation of the radiative heat flux from burned gas in a room under fully developed fire conditions, experiments were conducted in a small scale room model. The gas temperature in the model was measured using a fine thermocouple and was theoretically corrected to compensate the delay due to thermal inertia. The amounts of the radiative fluxes, k(T)4 based on the average of the fourth power of the real temperature and kT4 on the fourth power of the average temperature were evaluated respectively, and the ratio, (kT4/(k(T)4) was estimated. The estimated ratio was mostly 1.1-1.3 with 1.7 at the maximum. This fact suggests that the effects of temperature fluctuations play an important role in causing the difference between these heat fluxes.

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