Experimental Investigation on Shock Wave Characteristics of Aluminized Explosives in Air Blast

To investigate the shock wave characteristics of RDX-based aluminized explosives, air blast tests were conducted for measuring the parameters of 10 kg aluminized explosives which contained 0-40% aluminum. The results showed that with the increasing of aluminum content, the overpressures and impulses increase at first and then decrease within 7 m or 5 m, which reached the maximum when aluminum content was 20% or 30%. Power exponential formulas are used to fit the shock wave parameters vs scaled distance, where an equal weight of TNT is used to calculate the scaled distance. The overpressures of HL0 and TNT in tested locations not only conform to the similar law, but also conform to the same attenuation law after gaining the scaled distances of equal TNT mass. The pre-exponential factors of overpressure and impulse, k_p and k_I, decrease along with the increasing of Al content and keep the same pace as the calculated P_CJ. The attenuation coefficients a_P and a_I increase at first and decrease later with the increasing of aluminum content, and they reached the maximal values with 30% Al containing, which keeps the same pace as the calculated Q_V.