DocumentCode :
925916
Title :
Friction and ablation measurements in a round bore railgun
Author :
Aigner, S. ; Igenbergs, E.
Author_Institution :
Lehrstuhl fur Raumfahrttech., Tech. Univ. Munchen, West Germany
Volume :
25
Issue :
1
fYear :
1989
fDate :
1/1/1989 12:00:00 AM
Firstpage :
33
Lastpage :
39
Abstract :
Detailed experiments were performed in order to determine electrode ablation and friction effects in a round-bore railgun. An accelerating model was developed which includes electrode-ablation effects, the viscous arc drag, and the mechanical friction of the projectile. In addition, a novel nonlinear electrode-ablation model was found to describe the experimental data very well. A model for the mechanical friction force between the projectile and bore wall was applied to the equation of motion. The position/time data of the projectile acceleration could be adjusted with quite reasonable friction effects. Theoretical and experimental results show that the `ideal´ projectile velocity is decreased by about 28%: 15% due to electrode ablation, 9% due to mechanical friction, and about 4% due to viscous arc drag
Keywords :
drag; electromagnetic launchers; friction; mechanical variables measurement; projectiles; ablation measurements; accelerating model; friction effects; friction measurements; mechanical friction; nonlinear electrode-ablation model; position/time data; projectile; round bore railgun; viscous arc drag; Boring; Capacitors; Coils; Drag; Friction; Projectiles; Railguns; Rails; Switches; Test facilities;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/20.22500
Filename :
22500
Link To Document :
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