水素-空気爆燃における火炎伝播速度と爆風圧力のスケール則

摘要

A scaling model for deflagrative blast decay is developed based on the Strhelow's constant-velocity flame model and the field experimental records of pressure transducers and high-speed video images of spherical flames in hydrogeivair clouds. The model provides a scaling rule in which the blast over-pressure normalized by the observed flame propagation velocity decays inversely proportional to the 0.73 power of the distance normalized by the characteristic explosion length. A similar decay behavior is also obtained for the normalized positive impulse. The impulse decay curves for lean and rich gas mixtures do not coincide, although the decay rates are close values.%水素は，次世代エネルギとして期待されているが，rn爆発危険性が高く，爆発の被害定量評価と防止・減災rn対策の確立が重要な課題となっている．著者らはrn体積約0.15m~3と1.4m~3のゴム風船を用いた2種類rnの野外実験を行った．