Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Railguns"”.
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Design, Optimization, and Testing of a Transaugmented Electromagnetic Railgun for Use as a Hydrogen Pellet Accelerator
… venting chambers placed between short augmented railguns to minimize viscous drag. The results of the 120-$\mu$s pulse experiments suggest that a multipulsed railgun pellet injection system may be capable of accelerating solid hydrogen pellets to high velocities.
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Electromagnetic Railgun Launchers: Practical and Theoretical Perspectives
Railguns are highly complex multi-disciplinary engineering systems that use electricity to launch projectiles at very high speeds. This dissertation investigates new technologies, models, and theories necessary for the development of practical systems to bring the railgun out of the lab and into …
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A counterpulsed, solid-state opening switch
Railguns have great potential in military roles; however, they currently lack a fieldable power supply. Recent advances in the state of low voltage power storage devices may enable practical Pulse Forming Inductive Network power supplies to be developed if a suitable current interruption device is …
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Design and Characterization of a Coaxial Plasma Railgun for Jet Collision Experiments
Plasma railguns are electromagnetic accelerators used to produce controlled high velocity plasma jets. This thesis discusses the design and characterization of a small coaxial plasma railgun intended to accelerate argon-helium plasma jets. The railgun will be used for the study of plasma shocks in …
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Improvement of Electromagnetic Railgun Barrel Performance and Lifetime by Method of Interfaces and Augmented Projectiles
… and gauged to not be problematic on larger scale railguns. The liquid metal was found to greatly improve contact and not introduce extra resistance but its hazardous nature and tremendous cost detracted from its usability. The simulated resistivity augmented projectiles were able to mitigate …
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A Finite Difference Approach to Modeling High Velocity/Variable Loads using the Timoshenko Beam Model
Electromagnetic launchers (railguns) are set to replace traditional large caliber ship mounted cannons in the near future. The success of the railgun depends heavily upon a comprehensive understanding of beam behavior during periods of heavy dynamic loading. It is hypothesized that the combination …
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The onset of gouging in high-speed sliding contacts
… as rocket sled test tracks, light gas guns, and railguns. Gouging takes the form of teardrop-shaped craters on the rail surface, and usually only occurs above a threshold speed which is dependent on the slider and rail material properties. In this dissertation, the onset of gouging was studied …
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Analysis of Electromagnetic Launcher Design and Modeling
… to gain a deeper understanding of the nature of railguns. The expressions are refined for ease of use and then compared to electromagnetic simulators that solve complex equations that arise from different rail geometry. Further simplifications lead to an expression for the final velocity of the …