0403 3-dimensional Visualization of the Shock Wave by Explosive with Background-Oriented Schieren Method Using the Transmitted Background.

Abstract

This paper describes three-dimensional visualization of explosion generated by small-amount of explosive. The visualization method was used Background-Oriented Schlieren (BOS) method with a high-speed camera. The explosive was used a PETN pellet with a mass of 0.5 g. The explosive was ignited with a detonation. The OHP sheet printed random dot pattern was used as the transmitted background. Visualized images were processed by algorithm to reconstruct three-dimensional density distribution inside the shock front. The resultant reconstructed density distribution was compared with the result provided by numerical analysis. As a result, development of shock front of the reconstructed image agreed with an axis of symmetry image. While, density profile inside the shock front was not with fine accuracy.