Fieldp explosion tests of three hydrogen-air mixtures having a volume of 31 m3 were carried out. The hydrogen contents of the mixtures were 21.0, 28.7, and 52.9 volume %. Each mixture was ignited by 0.1 kg of Composition C-4 explosive and guided to detonation. Blast waves caused by detonation of a mixture were measured by piezoelectric pressure sensors. The measured peak overpressures and impulses were comparable in intensity to those of the TNT equivalent in lower heating value. The results reveal that the strength of a blast wave generated by detonation of a hydrogen-air mixture is approximately the same as that of a TNT explosive.
31 m3規模の水素濃度の異なる三種類の水素-空気混合気体（21.0, 28.7, 52.9 volume %）を用い、野外爆発実験を実施した。0.1 kgのコンポジションC-4爆薬を用いて点火し、混合気体を爆轟させた。ピエゾ圧電効果素子で爆風圧の測定を行った結果、測定されたピーク過圧とインパルスの強度は混合気体の低発熱量と等価なTNT爆薬の爆発によって発生する爆風に匹敵することがわかった。水素-空気混合気体の爆轟によって発生する爆風の威力はTNT爆薬によるものとほぼ同程度であることが明らかとなった。
Field explosion test, Hydrogen-air mixture, Explosive ignition, Detonation, Blast wave