Monitoring blast wave evolution and propagation using coupled visual recording and pressure measurements

Explosives are a group of special purpose materials, which are important in various branches of industry, such as mining, civil engineering and military. Interest in this type of materials has increased recently, especially due to the current geopolitical situation. Thus, it is important to assess the properties of the explosive as well as evaluate the effects of their use. This paper presents results of research on the analysis of the pressure distribution and characterization of the blast wave produced by two explosives: Ammonal and Heksoflen (95 wt.% RDX / 5 wt.% Viton A). During the research velocity of detonation was measured by four probes placed inside of the prepared charges. The pressure distribution of the blast waves was measured with use of the three pressure probes, placed at various distances from the detonation point. The obtained data were used to determine the explosive constants related to the overpressure, based on which the overpressure prediction was made at various distances for both tested explosives. Moreover, the detonation of the explosives have been recorded with use of Phantom v9.1 high-speed camera. Performed research indicates that, the pressure of the blast wave highly depends on the type of explosive used. Blast wave caused by Heksoflen is characterized by higher maximum pressure and impulse in comparison to Ammonal. After burning of intermediate detonation products differs significantly for the two explosives. After burning of the Heksoflen intermediate products is characterized with wider zone and longer times.