Year-end Sale % OFF 
Abstract
The paper presents experimental data and a model of an electromagnetic rail accelerator. The model includes an equivalent circuit, magnetic field in the system and movement of the projectile (that is solved separately) which is computed numerically. The main results are compared with our experimental data and friction force during acceleration is evaluated.
Highlights
Electromagnetic accelerators nowadays represent an interesting and promising technology, both in military and civil areas [1]
In this work we focus on evaluation of the friction force in a railgun device by comparing our Physics 2020, 2020,data experimental with the electromagnetic driving force calculated by finite element method (FEM)
The complete model is givenby bytwo twoordinary ordinary differential equations describing the transient current in the equivalent circuit and motion differential equations describing the transient current in the equivalent circuit and motion of of the the projectile, and one partial differential equation describing the distribution of magnetic field necessary projectile, and one partial differential equation describing the distribution of magnetic field necessary for forfinding findingthe themagnetic magneticforce
Summary
An important is bywith some parameters cannot inthe theIntroduction. Animportant importantcomplication complication is represented by some parameters that cannot in is represented by some parameters that cannot be be determined exactly, such as the drag forces. No part in the system rails–projectile is ferromagnetic In such a case, Equation (2) may be rewritten in the form below taking into account the Coulomb condition div A = 0. We obtain: part in the system rails–projectile is ferromagnetic Equation (2) may be rewritten in the form below taking into account the Coulomb condition div A = 0 These approximations facilitate a numerical solution of Equation (5), to obtain the magnetic field and the accelerating force for a current density Jext according to Equation (3). The aerodynamic drag force is a function of the frontal area of the projectile and square of its velocity (via Mach number) [20]
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
