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

摘要

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.

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