Detonation velocity and pressure measurements were performed for heterogeneous mixtures consisted of packed beds of aluminum particles saturated with pure nitromethane using aluminum particles of 3 different sizes. In case of packed beds of aluminum particles of 30 and 110µm size, critical diameter was greatly decreased as in case of nitromethane containing small concentration of aluminum particles. Measured detonation velocity and pressure were compared with calculated values obtained by KHT code. Difference between measured and calculated detonation properties provides the evidence for lack of equilibrium between aluminum particles and detonation products of nitromethane.
The high energy generated from electric pulsed power has various applications. We investigated the underwater shock wave generated by the metal wire explosion and the electric discharge of electrode using high voltage impulsive current. This investigation was performed using optical observation, pressure measurement and current measurement. In the case of metal wire explosion, the velocity, pressure and the current value of underwater shock wave obtained from the experimental data is proportional to the electric resistance rate. In the other case, the discharge from the electrode, the velocity of the underwater shock wave generated by the discharge of electrode with metal wire explosion is faster than the underwater shock wave generated by the discharge of the electrode without metal wire.
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