Experimental study of armature melt wear in solid armature railgun

Chen, Lixue; Xiao, Zheng; He, Junjia; Xia, Shengguo; Deng, Fangfang; Tang, Liangliang

doi:10.1109/eml.2014.6920183

Cited by 3 publications

(4 citation statements)

References 4 publications

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“…Here, I 0 is the maximum value of the current, and τ is the time constant. Incidentally, the exponential current is used in the railgun experiments [10].…”

Section: Electromagnetic Currentmentioning

confidence: 99%

Numerical Approach to Enhanced-Performance of Superconducting Linear Accelerator Using Multiple-Electromagnets

Takayama

Saitoh

Kamitani

2023

JASSE

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The performance of a superconducting linear accelerator (SLA) system for a pellet injection to fuel nuclear fusion reactors has been investigated numerically. For this purpose, a numerical code has been developed to analyze the shielding current density and dynamic motion of a high-temperature superconducting thin film by means of finite element method. In the present study, an exponentially increasing current was employed to drastically accelerate a pellet in the container. Computational results indicate that the acceleration distance required for the SLA system to reach the target speed of 5 km/s was approximately 2.5 km, it is reduced to approximately 88%. It was therefore concluded that the proposed current has the potential to improve acceleration performance significantly.

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“…Here, I 0 is the maximum value of the current, and τ is the time constant. Incidentally, the exponential current is used in the railgun experiments [10].…”

Section: Electromagnetic Currentmentioning

confidence: 99%

Numerical Approach to Enhanced-Performance of Superconducting Linear Accelerator Using Multiple-Electromagnets

Takayama

Saitoh

Kamitani

2023

JASSE

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“…The actual situation of current melting wave erosion in the armature is demonstrated by experimentally recovered armatures, where the actual process is more complex than predicted by the melting wave model [9][10][11][12]. Melting wave propagation is related to both the flow of the aluminum fluid and current distribution and is more obvious in stationary and low velocities situations.…”

Section: Armature Current Melting Wave Modelmentioning

confidence: 99%

A review of static/quasi-static calculations of Electromagnetic-thermal coupling sliding electrical contact characteristics of armature and rails

2023

J. Phys.: Conf. Ser.

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The analysis of the sliding electrical contact characteristics between the armature and rails is an important research area for electromagnetic railguns. In this paper, a sliding electrical contact model considering non-ideal factors is introduced, the magneto-thermal coupling characteristics of the contact interface are summarized, and the current and temperature distribution characteristics are outlined. In the end, measures that can be taken to improve the contact performance are presented in terms of armature rail material selection and structural optimization.

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“…The thickness of the throat is a key parameter in the design of a C-armature, which determines the flow through capacity of the armature. For a given throat thickness, the theoretical mass M of a C-type armature can be expressed as [8] :…”

Section: Figure 2 400ka Pulse Current Waveform For C-type Armaturesmentioning

confidence: 99%

“…Zhang Yongsheng [7] analysed the transient electromagnetic field characteristics of electromagnetic emission devices with different contact areas, and obtained that the minimum desired contact area for C-type armatures is the armature throat cross-sectional area, which was verified through tests. Yang [8] carried out an analysis of the dynamic characteristics of the armature-rail contact for C-type armatures with three types of cross-sections: planar, externally convex and internally concave. The analysis results pointed out that the curvature fit of the C-type armature with an internally concave cross-section has less influence on the dynamic structural response of the armature and the rail.…”

Section: Introductionmentioning

confidence: 99%

Parametric analysis and design of the initial contact state of a 400kA pulsed current C-armature

Liu

et al. 2023

J. Phys.: Conf. Ser.

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As a key component of an electromagnetic rail launcher, the armature plays a vital role in the performance of the electromagnetic launch. In order to solve the contact area and structural design problems of C-type armatures under large pulse current conditions, the material and initial contact state of a certain calibre C-type armature are studied, and the initial structural parameters of C-type armatures under 400kA through-current capacity and four times the calibre loading position constraints are analysed and calculated, together with the contact characteristics of armatures made of 6061-T6 and 7075-T6 aluminium alloys, to form At the same time, the parametric design of the C-type armature was carried out on the basis of the initial structural parameters, and the variation laws of contact stress, contact deformation, preload force and contact area were studied for different armature lengths, armature tail thickness, armature throat thickness and armature head height, with the encore law, contact area and plastic deformation stress as The structural dimensions of the C-type armature for a 400 kA pulse current are determined, providing a direction for the structural optimisation of subsequent large pulse current C-type armatures.

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Experimental study of armature melt wear in solid armature railgun

Cited by 3 publications

References 4 publications

Numerical Approach to Enhanced-Performance of Superconducting Linear Accelerator Using Multiple-Electromagnets

Numerical Approach to Enhanced-Performance of Superconducting Linear Accelerator Using Multiple-Electromagnets

A review of static/quasi-static calculations of Electromagnetic-thermal coupling sliding electrical contact characteristics of armature and rails

Parametric analysis and design of the initial contact state of a 400kA pulsed current C-armature

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