外部加熱された電線材料上の下方向火炎燃え拡がり現象と消炎現象に関する研究：

試料形状と試料の透明度が燃焼性に及ぼす影響

抄録

An experimental study was conducted to investigate the influences of external radiative heating and materials geometry and opacity on the flammability limits of electric wires. Firstly, overall characteristics of flame behavior over each sample wire were investigated based on the direct observation. It was found that downward spreading flame shows distinct types of unstable flame spread depending on the shape of wire at near extinction conditions and results in different extinction mechanisms. Among the results it was also found that external radiative heating extends the flammability limits of wire samples. Comparison were also made to examine the effect of metal core and materials opacity on the flammability of electric wires.