ENERGY RELEASE CHARACTERISTICS OF LAYERED CHARGE ENVELOPED BY ALUMINUM POWDER/RUBBER MATRIX COMPOSITE

To investigate the energy release characteristics of layered charge enveloped by aluminum powder/rubber matrix composite, the composites containing aluminum diameter D of 1μm, 10μm and 50μm were prepared and the confined explosion experiments for charges with layer/explosive ratios of 0.39, 0.68 and 1.52 were carried out in a 1.3-m3 explosion chamber. The tungsten-rhenium thermocouple was used to measure the internal explosion temperature history within the chamber. It is revealed that the measured temperature was enhenced with the increase of mass of outer layers. When the ratio increased from 0.39 to 0.68 and 1.52, the peak temperature increased from 329K to 517K and 882K, respectively. It is revealed that the excessive mass of layers are not conducive to the full release of energy generated from combustion. It is found that the layer with an aluminum powder size of 10μm exhibits the best effect on raising the temperature after the explosion, indicating that the medium-sized aluminum powder can fully react with detonation product and release more heat, which is beneficial to realizing the thermal radiation damage.