Influence of lubricant on the motion of a body in an electromagnetic railgun accelerator. III. Temperature distribution in the armature, rail, and liquid film

Дробышевский, Э. М.; Колесникова, Е. В.; Yuferev, V. S.

doi:10.1134/1.1259500

Cited by 10 publications

(1 citation statement)

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“…However, the calculation results and experimental results are quite different [14,15]. V. S. Yuferev's team studied the electromagnetic, force, and thermal characteristics of the metal liquid film while ignoring the dynamic changes in the thickness of the liquid film and defining the armature shape as a rectangle [16,17]. Thiagarajan and Heish established a two-dimensional magnetohydrodynamic model that considers the effects of electromagnetic forces, however they also ignored the effect of dynamic changes in the film thickness on the characteristics of the metal liquid film [18].…”

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confidence: 99%

Study on Lubrication Characteristics of Metal Liquid Film Based on Electromagnetic-Elastic Mechanics-Hydrodynamics Multiphysics Coupling Model

Xia

2020

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In an electromagnetic rail launcher, a metal liquid film is created at the armature/rail (A/R) contact interface. It has a significant impact on electromagnetic launch performance. In this paper, an electromagnetic-elastic mechanics-hydrodynamics multi physics coupling model is established in consideration of the metal liquid film’s own acceleration, magnetic pressure and dynamic changes in film thickness. Based on this model, the lubricating characteristics of magnetic pressure and fluid pressure distribution, film thickness distribution and velocity distribution of the metal liquid film were studied. When the velocity of the metal liquid film is very fast, and the magnetic pressure is reduced, it may fail to maintain stability and rupture, which may be an important reason for the transition. Finally, this paper analyzes the lubrication effect of the metal liquid film, and points out that when we want strictly to control the muzzle velocity, the lubrication effect of the metal liquid film must be considered.

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