Characterization of magneto-thermo-hydrodynamic lubrication of metal liquid film at armature/rail interface

Utilizing the magneto-thermo-hydrodynamic lubrication theory, this study investigates the armature/rail(A/R) interface under high-intensity currents and transient high-temperature conditions. A magneto-thermohydrodynamic lubrication model is established using the finite difference method, coupling electromagnetic field, temperature field, and hydrodynamic lubrication theory, to depict the lubrication mechanism of the A/R interface under the influence of electromagnetic and thermal interactions. The characteristics of magneto thermal diffusion for the armature/ rail, and the dynamic lubrication properties of the metal liquid film at the interface, are analyzed, to investigate how to improve the contact state of the A/R interface and enhance the stability of the electromagnetic rail launch. The findings are of significant importance for predicting frictional and thermal losses at the A/R interface and enhancing its performance.

Automated summary

This study investigates the armature/rail (A/R) interface under high-intensity currents and transient high-temperature conditions using the magneto-thermo-hydrodynamic lubrication theory. A coupling model is established to describe the lubrication mechanism and analyze the dynamic lubrication properties of the metal liquid film at the interface. The findings are important for enhancing the stability and performance of electromagnetic rail launch.