Simulation and Analysis of the Railgun Muzzle Flow Field Considering the Arc Plasma

Gao, Yuan; Xiao, Hongcheng; Ni, Yingchun; Xu, Yong; Wan, Gang; Li, Baoming

doi:10.1109/tps.2018.2885018

Cited by 16 publications

(3 citation statements)

References 19 publications

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“…Under the rail current of 43kA, no phase change is expected in the copper rails or iron armature with moderate convection [24]. Due to lower melting points, an aluminum 6063 alloy armature would require greater minimal convection to prevent phase change due to joule heating [6], [21].…”

Section: Heat Transfer Analysismentioning

confidence: 99%

“…Railgun technology is a proven method of material propulsion, typically used in military artillery to rapidly launch ammunition at high speeds. In a railgun system, two rails are electrified by an applied current and ground node which generates a resultant magnetic field (B-field) and electromagnetic (EM) force to induce linear motion in an armature [5], [6]. In a conventional railgun system, the armature acts both as the load to accelerate ammunition to high speeds and as a conductive bridge between the two rails to complete the circuit [7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Railgun Secondary Propulsion System for High-Speed Hyperloop Transportation

Siemenn

Deo

et al. 2023

IEEE Trans. Plasma Sci.

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Secondary propulsion methods for high-speed hyperloop transportation are sparsely researched. Secondary propulsion methods are essential to quickly, efficiently, and safely get a hyperloop pod up to its target speed from a stationary state. In this paper, we propose and analyze the feasibility of a form of electromagnetic secondary hyperloop propulsion, called a railgun, commonly used in modern-day artillery technology for high-speed ammunition launching. We assess the feasibility of two different materials and three different geometries for a railgun armature to propel a hyperloop pod. Inverse design of multiphysics simulation of multibody dynamics, magnetic fields, and electric currents are used for material selection of the armature that minimizes rail current energy requirements and the armature geometry that maximizes structural integrity.

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Section: Heat Transfer Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Railgun Secondary Propulsion System for High-Speed Hyperloop Transportation

Siemenn

Deo

et al. 2023

IEEE Trans. Plasma Sci.

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show abstract

“…Therefore, the system fault caused by the arc is the key problem that restricts the service life of the sliding electrical contact system. For example, in the field of electromagnetic railgun, the arc generated between the armature electrode and the rail electrode causes serious ablation and loss of electrode material, which leads to rapid deterioration of the sliding electrical contact performance of the armature/rail contact interface [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Research on dynamic characteristics of arc under electrode relative motion

Dong

Wu²,

Qian³

et al. 2023

Plasma Sci. Technol.

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The relative motion of the electrodes is a typical feature of sliding electrical contact systems. The system fault caused by the arc is the key problem that restricts the service life of the sliding electrical contact system. In this paper, an arcing experimental platform that can accurately control the relative speed and distance of electrodes is built, and the influence of different electrode speeds and electrode distances on arc motion characteristics is explored. It is found that there are three different modes of arc root motion: single arc root motion mode, single and double arc roots alternating motion mode, and multiple arc roots motion mode. The physical process and influence mechanism of different arc root motion modes are further studied, and the corresponding relationship between arc root motion modes and electrode speed is revealed. In addition, to further explore the distribution characteristics of arc temperature and its influencing factors, an arc magnetohydrodynamic model under the relative motion of electrodes is established, and the variation law of arc temperature under the effect of different electrode speeds and electrode distances issummarized. Finally, the influence mechanism of electrode speed and electrode distance on arc temperature, arc root distance, and arc root speed is clarified. The research results enrich the research system of arc dynamic characteristics in the field of sliding electrical contact, and provide theoretical support for restraining arc erosion and improving the service life of the sliding electrical contact system.

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Research on arc evolution law of arc extin‐ction device under high‐speed large current

Jia,

Huang,

Song

et al. 2024

Materialwissenschaft Werkst

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The lifespan of the guide rail is a bottleneck restricting the operational life of electromagnetic railguns. A well‐designed arc extinguishing device can reduce the arcing erosion caused by residual currents within the guide rail. The CuW alloy is widely used in the high‐pressure arc extinction field due to its excellent electrical and thermal conductivity, high strength, and hardness. Based on the theory of equilibrium state arc plasma, a finite element model of the air arc‐CuW electrode coupling in the arc extinction device was established to study millisecond‐level arc initiation, evolution, extinguishing characteristics, and distribution patterns under extreme and harsh operational conditions with a current input of 110 kA. The highest temperature in the arc column region was found to exceed 50,000 K. The study elucidated the influence of arc extinction device parameters on arc evolution, breakdown time, and breakdown voltage. Consequently, it established that the R70 spherical electrode exhibits optimal arc extinguishing characteristics. The aim of this research is to provide theoretical support for optimizing the arc suppression device. Additionally, experiments on high‐speed and high‐current arc extinction device discharges were conducted to validate the finite element analysis results regarding arc diffusion patterns and electrode erosion.

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Simulation and Analysis of the Railgun Muzzle Flow Field Considering the Arc Plasma

Cited by 16 publications

References 19 publications

A Railgun Secondary Propulsion System for High-Speed Hyperloop Transportation

A Railgun Secondary Propulsion System for High-Speed Hyperloop Transportation

Research on dynamic characteristics of arc under electrode relative motion

Research on arc evolution law of arc extin‐ction device under high‐speed large current

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