活性元对低附带毁伤弹药的近场超压增强效应

To realize the effect of the near-field shock wave enhancement of low collateral damage ammunition, this study proposes to add reactive material into the embedding layer of heavy metal particle in the sub-package low collateral damage ammunition to enhance the near-field overpressure and specific impulse. Static explosion experiments with different contents of reactive material were carried out, and the pressure curves of the near field and the mid-far field shock wave after the explosion were measured by the free field pressure test system. The results show that: after adding a certain content of reactive material into the heavy metal particle intercalation, the peak value of the overpressure and the specific impulse of shock wave at 37.5 times charge diameter are increased by 31.6% and 21.3%, respectively. According to the experimental results, the parameters of the Miller reaction rate model were determined by numerical simulation, and the law of energy release after-combustion reaction of the active element and the time-dependent change of the reactivity of the reactive material components were discussed. The duration of the secondary combustion can reach 300 ms under the ideal situation of sufficient combustion, and an optimal proportion of the range of reactive material content is likely exist. This research provides considerable development direction and application prospects for the regional enhancement effect of near-field shock wave and its engineering design of sub-packaged low collateral damage weapons.