空隙媒体を通過する衝撃波の伝播(対流・拡散・渦・波動波動(1),一般講演)

概要

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Attenuation of blast wave is one of the important research field related to safety assessment and prevention from explosion hazards. Those in porous layers have not been investigated nor are their precise measurements possible. However, the introduction of scaled blast wave parameters normalized with charge mass enables to perform a small scale explosion in open-cell foam, whose result is readily convertible to large-scale one. This study is a part of series of research on shock in porous material. Propagation and attenuation of blast waves in porous material is experimentally investigated by detonating micro-explosive, such as sliver azide pellet. Part of projects regarding shock wave and blast wave motions in complex multi-phase media investigated the attenuation of strong shock pressure in sand layer with low-porosity φ_g=0.435 and high density ρ_c=1500kg/m^3; and glass beads with low-porosity φ_g=0.360 and high density ρ_c=1600kg/m^3; and foam with low-porosity φ_g=0.435 and high density ρ_c=1500kg/m^3. Pressure attenuation caused in present complex media was decreased to 95% of the peak overpressure value in air.
日本流体力学会の論文
2009-09-02