Science and Technology of Energetic Materials

Vol.77, No.4 (2016)

Research paper

Field experiment of blast wave pressure modulation past a turbulent flow
Takahiro Tamba, Daiki Furukawa, Yuma Aoki, Masaya Kayumi, Akira Iwakawa, Akihiro Sasoh, Takehiro Matsunaga, Mitsuo Izumo, Yuta Sugiyama, Tomoharu Matsumura, and Yoshio Nakayama


An experimental investigation of the interaction between a quasi-planar blast wave generated by 0.5 g report composition and a counter-turbulent flow was conducted in a square field having an area of 20 x15 m2. In the experiments, overpressure waveforms of the blast waves were measured using four microphones for both the cases without flow and with turbulence when the speed of natural wind was 0.0 m s-1. Without flow, the waveforms were similar to the Friedlander waveform, and the standard deviation between local standardized peak overpressures was 2% of the average of the standardized overpressure. In contrast, with turbulence, the waveforms were modulated between shots, and the standard deviation was 11% of the average of the standardized overpressure.

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field experiment, blast wave, shock wave, turbulence, interaction

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