Field explosion tests have been performed to obtain fundamental data concerning the explosion strength generated by a stoichiometric mixture of hydrogen and air. Hydrogen-air mixtures filled in a tent covered with thin plastic sheets were ignited by an electric spark to explode. The generated blast wave was measured with piezoelectric pressure sensors. Deflagration tests with volumes of 9.4, 75, and 200 m3 were carried out to investigate the scale effect (i.e. volume dependency) of peak overpressure and blast wave impulse. Obtained data show that peak overpressure and impulse exhibit different volume dependencies.
化学量論比程度の水素-空気混合気体を電気火花によって点火し，発生した爆風をピエゾ圧力効果素子で 測定した。体積が9.4, 75, 200 m3の混合気体を用いて爆燃実験を行い，爆風のピーク過圧とインパルスの評価を行った。実験結果から，ピーク過圧とインパルスは規模効果が異なることが示された。
Stoichiometric mixture of hydrogen and air, Electric spark ignition, Deflagration, Blast wave, Scale effect