J. Phys. IV France
Volume 10, Numéro PR11, November 2000
Fourth International Workshop on Ram Accelerators
Page(s) Pr11-3 - Pr11-9
Fourth International Workshop on Ram Accelerators

J. Phys. IV France 10 (2000) Pr11-3-Pr11-9

DOI: 10.1051/jp4:20001101

Ram accelerator operations at acceleration level up to 6 x 104 g

Y. Hamate, A. Sasoh and K. Takayama

Shock Wave Research Center, Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba, Sendai 980-8577, Japan

Experiments were conducted using a 25-mm-bore ram accelerator. By varying the projectile mass and the mixture fill pressure, the projectile acceleration level was varied by a factor of three. The acceleration performance is evaluated based on a ballistic efficiency. Over a velocity range from 80% to 110% of Chapman-Jouguet detonation velocity, the ballistic efficiency was kept almost constant, and did not depend on the acceleration level.

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