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Science and Technology of Energetic Materials

Vol.72, No.5 (2011)

Research paper

Blast pressure measurement of small charged powder TNT in a closed explosion chamber(*in Japanese)
Hiroyuki Arai, Reiko I. Hiyoshi, and Jun Nakamura
p.141-146

Abstract

Under experiments in a closed explosion chamber, the mass of charge is restricted to a small amount. In order to utilize TNT as a standard explosive in the chamber, the detonation of small amount of TNT was evaluated by measurement of blast pressure. Since the confinement and initiation pressure had no effect on the blast pressure and the experimental values of the peak overpressure and the scaled arrival time were in good agreement with the reference, it was recognized that 50g of powder TNT (the charge density : ca. 800kg•m-3) detonated completely. The second order regression approximation lines of the peak overpressure, the scaled impulse of positive phase, and the scaled arrival time were derived as the TNT standard equations of the blast parameters in the chamber.

> Full text (Open access*)

Keywords

blast wave, peak overpressure, scaled impulse of positive phase, scaled arrival time, TNT

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