Abstract
The operation of rapid burst firing multirail electromagnetic launchers of solids is numerically simulated using unsteady two-dimensional and three-dimensional models. In the calculations, the launchers are powered by a Sakhalin pulsed magnetohydrodynamic generator. Launchers with three and five pairs of parallel rails connected in a series electrical circuit are considered. Firing sequences of different numbers of solid projectiles of different masses is modeled. It is established that the heating of the rails is one of the main factors limiting the performance of launchers under such conditions. It is shown that the rate of heating of the rails is determined by the nonuniformity of the current density distribution over the rail cross-section due to the unsteady diffusion of the magnetic field into the rails. Calculations taking into account the unsteady current density distribution in the rails of a multirail launcher show that with an appropriate of the mass of the projectiles (up to 800 g), their number in the sequence, and the material of the rails, it is possible to attain launching velocities of 1.8–2.5 km/s with moderate heating of the rails.
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References
H. D. Fair, “The Past, Present and Future of Electromagnetic Launch Technology and the IEEE International EML Symposia,” IEEE Trans. Plasma Sci. 41 (5), 1024–1027 (2013).
I. R. McNab, “Large-Scale Pulsed Power Opportunities and Challenges,” IEEE Trans. Plasma Sci. 42 (5), 1118–1127 (2014).
Yu. L. Bashkatov, A. V. Orlov, I. A. Stadnichenko, et al., “Operation of a Railgun Accelerator for Solid Projectiles Powered from an Explosive MHD Generator,” Fiz. Goreniya Vzryva 22 (3), 111–115 (1984) [Combust., Expl., Shock Waves 22 (3), 353–357 (1984)].
N. Harada, “Space Application of Non-Equilibrium MHD Generator,” in Proc. of the 2nd Intern. Workshop on Magnetoplasma Aerodynamics in Aerospace Applications, Moscow, 5–7 Apr. 2000 (Inst. High Temperatures, Moscow, 2000), pp. 325–329.
S. V. Sinyaev, V. V. Burkin, and E. Yu. Pimonov, “Ways of Developing a Rapid-Fire Electrodynamic Launcher: The Results of Experimental and Theoretical Studies,” in Modern Methods of Designing and Testing Missile and Artillery Systems: Proc. Sci. Conf. of the Volga Regional Center of the Russian Academy of Rocket and Artillery Sciences (Inst. Exp. Phys., Sarov, 2000), pp. 507–512.
E. P. Velikhov, R. V. Dogadaev, V. P. Panchenko, et al., “Study of Properties of Combustion Products of Advanced Solid Plasma-Generating Propellant for Pulsed MHD Generators,” Dokl. Akad. Nauk 433 (2), 190–195 (2010).
A. G. Afonin, V. G. Butov, V. P. Panchenko, et al., “Multirail Electromagnetic Launcher Powered from a Pulsed Magnetohydrodynamic Generator,” Prikl. Mekh. Tekh. Fiz. 56 (5), 91–101 (2015) [J. Appl. Mech. Tech. Phys. 56 (5), 813–822 (2015)].
G. C. Long and W. F. Weldon, “Limits to the Velocity of Solid Armature in Railgun,” IEEE Trans. Magnetics 25 (1), 347–352 (1989).
S. V. Stankevich and G. A. Shvetsov, “Effect of the Shape of Metal Solids on Their Rate of Joule Heating in Electromagnetic Rail Launchers,” Prikl. Mekh. Tekh. Fiz. 50 (2), 205–216 (2009) [J. Appl. Mech. Tech. Phys. 50 (2), 342–351 (2009)].
H. Knopfel, Pulsed High Magnetic Fields (North-Holland, Amsterdam, 1970; Mir, Moscow, 1972).
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Original Russian Text © S.V. Stankevich, G.A. Shvetsov, V.G. Butov, S.V. Sinyaev.
Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 58, No. 5, pp. 131–141, September–October, 2017.
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Stankevich, S.V., Shvetsov, G.A., Butov, V.G. et al. Thermal limitations in a rapid-fire multirail launcher powered by a pulsed magnetodhydrodynamic generator. J Appl Mech Tech Phy 58, 871–880 (2017). https://doi.org/10.1134/S0021894417050133
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DOI: https://doi.org/10.1134/S0021894417050133