Effect of Temperature on the Performance of Induction Coil Launcher

Abstract

Under the action of continuous pulse current, the Joule heat of the synchronous induction coil launcher will continue to accumulate with the increase of the number of pulses, resulting in a significant increase in the temperature of the coil. The mechanical and thermal parameters of the coil and reinforcement materials will change with the increase of the temperature. At present, most studies usually set the relevant mechanical parameters and thermal parameters as constants that do not change with temperature, ignoring the influence of temperature on the relevant parameters. In order to explore the influence of material parameters changing with temperature on the mechanical and thermal properties of induction coil launcher, the 2D transient magnetic-structure-thermal field coupling calculation model of a single-stage coil launcher is established. The temperature dependent material parameters and anisotropic material conditions are added to the model. The von mises stress on the coil during continuous pulse discharge of the single-stage coil launcher is simulated, and the heat dissipation process of the coil under natural cooling is analyzed. The results show that: after 15 pulse discharges, compared with the material parameters that change with temperature, the stable temperature is 5.5 ℃ lower than that of material parameters that do not change with temperature, which is a decrease of 5.63%. For mechanical properties, the stress level of the inner conductor of the material parameters that change with temperature is increased by 30 Mpa, which is an increase of 17.34%.