Résumé
One of the main issues of railguns is the ablation of the rails due to the existence of a plasma arc occurring at high currents. To avoid the heat load on the rails, it is necessary to reduce the current intensities. The use of a parallel augmented railgun is one method of lowering the current without reducing the electromagnetic force on the projectile. One- and two-brush projectiles have been fired in a parallel augmented railgun with a 15 mm × 15 mm caliber and with a barrel length of 1.5 m. These experiments have shown that the maximum kinetic energy at the muzzle - without the transition of the solid contact between the rails and the brush to a plasma contact - can be significantly increased in an augmented railgun. The maximum kinetic energy has increased by a factor of 5 for one-brush projectiles and by a factor of 9 for two-brush projectiles. A model for the electromagnetic force in the augmented railgun and a friction model for the brush projectile are presented. The kinematics of the projectile in the gun are simulated with these models and are compared to the measured velocity. A good agreement is obtained.
langue originale | Anglais |
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Pages (de - à) | 188-193 |
Nombre de pages | 6 |
journal | IEEE Transactions on Magnetics |
Volume | 41 |
Numéro de publication | 1 II |
Les DOIs | |
état | Publié - janv. 2005 |