Science and Technology of Energetic Materials

Vol.62, No.1 (2001)

Research paper

Detonation behavior of emulsion explosives (II)
Optical observation of detonation front in emulsion explosives (*in Japanese)
Yoshikazu Hirosaki, Tetsuya Sawada, Yukio Kato, Hideki Hamashima,
and Shigeru Itoh


The detonation front curvatures were observed with an optical technique for the emulsion explosives sensitized with various sizes of inorganic or organic microballoons. The detonation fronts in the emulsion explosive sensitized with smaller voids up to 0.5 mm are smooth, and those in the emulsion explosives containing larger balloons are shown to be turbulent. The reaction zone length calculated from the Wood - Kirkwood equation, which relates the curvature of the detonation wave front and the reaction zone length, correlate fairly well with that derived from the Eyring's equation, which gives the reaction zone lengths from the diameter effect of the detonation velocity. The effects of the increase of water content and the addition of aluminum powder into the emulsion explosive formulation were evaluated by observing the detonation front curvatures to calculate reaction zone length.

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