| Super high firing frequency gun is a new firing principle gun, using the "metal storm" technology. In construction, it consists of two parts, namely, the ignition control device and the firing device. The ignition control device can emit firing pulses in series to ignite the propellant, while the firing device contains several projectiles in tandem. Because of the high firing frequency, the interior ballistics process of individual projectile can interfere with each other. A series of studies focused on these problems have been carried out. These points are as follows:1.An experimental device for ignition control is designed. Equipped with Single-Chip Microcomputer and some periphery chips and circuits, this device can realize the ignition control of every firing type of the super high firing frequency gun, and provide hardware support for the experiment of the gun.2.A classical interior ballistics model is developed to simulate the interior ballistics process. Projectile movement in the tube and the pressure change with time under different firing conditions are solved, the influences of firing frequency on tube pressure and the initial velocity are also analyzed.3.A one-dimension two-phase model is developed to simulate the interior ballistics process. Parametric studies are performed in the numerical model to determine their variation in time and space, and the results are compared with the experimental results. Numerical simulations are then used to analyze the effects of firing frequency on the interior ballistics performance and firing security, which in turn provide data support for future high frequency and high pressure experiments and gun designs.
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