Science and Technology of Energetic Materials

Vol.67, No.3 (2006)

Research paper

Burst phenomenon of spherical firework shell (I)
- Observation of burst phenomenon of firework shell by high-speed photography -
Kunihiko Wakabayashi, Shuji Hatanaka, Norihide Suruga, Tomoharu Matsumura, Yoshio Nakayama, and Masatake Yoshida


We performed explosion tests on two kinds of firework shells having different diameters (170 mm and 235 mm) and different amounts of bursting charges, etc., in the explosion chamber, and took sequential photographs of explosion and burst phenomenon with a high-speed camera. The obtained photographs first show flames belching out from the joint of a pair of hemispherical shell-packages at the early stage of burst just after the firework shell bursts. Moreover, the photographs prove that a neighboring object adjacent to the firework shell is compressed due to rapid expansion caused by the burst.

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Firework shell, High-speed photography, Burst phenomenon

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