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開口の少ない区画火災の燃焼率に関する模型実験手法の検証

実規模実験と縮小模型実験の比較

中村 正寿^＊１・道越 真太郎^＊１・長谷見 雄二^＊２

これまでに，可燃物量に対して開口の少ない室における火災について，開口形状や火源位置などの火災室の幾何学的条件が燃焼率に影響すること及びそれまで定量的手法が無かった燃焼率の推定に縮小模型実験が有効であることを縮小模型実験で確認している。本研究では，実規模の区画火災実験を行い，縮小模型実験結果と比較することで，縮小模型実験によって開口の少ない実規模の区画火災における燃焼率を推定できることを検証した。

＊１ 技術センター 建築技術研究所 防災研究室
＊２ 早稲田大学

Validation of the Reduced-scale Test Technique for Predicting the Combustion Efficiency in a Compartment Fire with Small Openings

Comparison of Small-scale and Full-scale Tests

Masatoshi NAKAMURA^*1, Shintaro MICHIKOSHI^*1 and Yuji HASEMI^*2

The objective of this study was to confirm that the combustion efficiency in full-scale compartment fire with small openings can be predicted from a reduced-scale test. Our previous experiment had revealed that combustion efficiency is affected by the compartment geometry, including the shape of the openings and the location of the fire source. A testing technique using a geometrically similar but reduced-scale model had been developed to predict the combustion efficiency in a compartment fire with small openings. The technique is based on the results of fire tests using medium- and small-scale compartments. Two full-scale compartment fire tests were conducted using different opening geometries. The measured combustion efficiencies showed good agreement with those of our previous reduced-scale tests, validating the reduced-scale test technique for predicting the combustion efficiency in a full-scale compartment fire.