火花放電および細線爆発により発生する衝撃波のシュリーレン法による観測

概要

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The initial stages of the generation of impulsive sounds caused by two types of electric discharge ; which were the spark discharge and the wire explosion method, were observed by a high-speed photographic recording system combined with the schlieren method. The shapes of the shock front and the propagation velocity near the electrodes were observed using there schlieren photographs. In the sense of sight, it was found that the wave front of impulsive sound generated by the spark discharge using the small gap showed a spherical shape and a sound was generated nearly at the time when the discharge current began to flow. It was also found that the shock fronts produced by the wire explosion method showed the cylindrical shape. The propagation velocity of the shock near the electrodes was measured and the increase of the propagation velocity caused by the highly intensive nonlinearity was recognized. The shock amplitude was estimated by using the observed propagation velocity.
社団法人日本音響学会の論文
1981-06-01