Temperature And Pressure The Pharmaceutical Shock Wave Effect Study

The influence of thermobaric explosive on shock wave and after-burning effect has been investigated both experimentally and numerically. The distribution of shock wave overpressure, positive effect time and impulse was obtained by outdoor blast experiment. The experiment data of 20kg thermobaric explosive at different measurement points reveal that the ratio of after-burning pressure to shock wave pressure is about 15% to 95%, and the positive effect time is increased about 5ms to 12ms. It indicates the aluminum has a dominated advantage for improving the explosive work capability. The results also show that the pressure affected by after-burning is not the same as that of traditional explosive. According to the experiments with 20kg thermobaric explosive in this paper, the after-burning effect has a declined process of within 10 meters from the explosion center, but a sudden rise beyond 10 meters. An after-burning model has been proposed, based on the point explosion model, two-step chemical reaction model and the classic theory of secondary reaction. The parameters of the model have been fitted through experiment data and theory calculation. The after-burning process of 20kg thermobaric explosive has been simulated with the SHOCKIN program, and the result reveals that it is practical for calculation of after-burning with the above model by using the SHOCKIN program.