Explosion Temperature and Dispersion Characteristics of Composite Charges Based on Different Non‐detonative Materials. Issue 12 (10th October 2018)

• Record Type: Journal Article
• Authors: Hong, Xiao‐wen; Li, Wei‐bing; Wang, Xiao‐ming; Li, Wen‐bin; Li, Rui
• Is Part Of: Propellants, explosives, pyrotechnics. Volume 43:Issue 12(2018)
• Page Start: 1251
• Page End: 1262
• Publication Date: 2018-10-10
• Subjects: Composite charge -- Non-detonative material -- Explosive fireball temperature -- Dispersion radius; Propellants -- Periodicals; Explosives -- Periodicals; 662.2
• DOI: 10.1002/prep.201800132
• Languages: English
• ISSNs: 0721-3115

Abstract

Abstract: The explosion fireball temperature and scattering process of explosive products of annular composite charges were investigated to guide the selection of non‐detonative materials with controllable composite charge output. Overpressure sensors, an infrared thermal imager, and a high‐velocity photography system were used to compare the explosive fireball temperature, scattering movement, and post‐combustion characteristics of composite charges with different non‐detonative materials. The fireball temperature distributions of the active non‐detonative materials (rubber containing various proportions of aluminum powder) were not uniform, and the heat radiation power, heat flux, and overpressure were relatively high and first decreased and then increased with increasing aluminum powder content. The active non‐detonative materials had two high‐temperature regions in the lateral direction. Oxygen‐free explosions, anaerobic combustion, and post‐combustion processes occurred during the energy‐release reaction of the composite charges. The temporal evolution of the throwing radius of the explosion products of the composite charges was investigated, and the rate of scattering of the non‐detonative materials was analyzed. The rate of scattering was higher than that of an inert non‐detonative material (polyurethane) and first increased and then decreased with increasing aluminum powder content. Based on the explosion‐proof performance and heat radiation energy output characteristics, rubber containing 50 % aluminum was selected as the optimal non‐detonative material. Abstract :