Numerical simulation of interior ballistic process of railgun based on the multi-field coupled model

Lin, Qiang; Li, Baoming

doi:10.1016/j.dt.2015.12.008

Cited by 45 publications

(25 citation statements)

References 8 publications

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“…When the environment temperature is over 120 °C, the device will be malfunctioning, and the soldered components in the circuit fall off, which severely affects the accuracy. The temperature of the armature show that the temperature field is mainly distributed in the end of armature tail, and the temperature in the front part of armature is close to normal temperature [16]. Therefore, the position of the projectile is more suitable for the testing system.…”

Section: A Improvements Of Projectile-borne Storage Testing System 1) Minimizing Effects Of High Temperature Through Heat Insulationmentioning

confidence: 99%

“…But they mainly studied the stability and continuity of electromagnetic launching system. For example, Hsieh K T, Li, and Lin et al [5][6][7] modeled the mechanism to provide a simulation basis. Besides, it was reported that the coupling of the extreme multi-physics environment may cause many transient effects, such as the velocity skin effect (VSE) [8] and melt-wave erosion [9].…”

Section: Introductionmentioning

confidence: 99%

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In-Bore Dynamic Measurement and Mechanism Analysis of Multi-Physics Environment for Electromagnetic Railguns

Yang

Dai

Yin³

et al. 2021

IEEE Access

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Electromagnetic launch technology has important applications in many fields. However, the extremely harsh multi-physics environment during the launch is quite different from that of conventional guns. Little experimental research studied the dynamic distribution of the extreme impact environment and magnetic fields in the projectile. To this end, this paper designs a projectile-borne storage testing system for the dynamic measurement of harsh multi-physics environments. The detailed assessment of the measured dynamic multi-physics field shows that the velocity skin effect (VSE) is an important factor affecting the dynamic results. It causes a higher current density in the armature, and the magnetic induction and acceleration in the dynamic experiment are lower than those in the static-based experiment and simulation. Moreover, it causes the concentrated heat on the trailing edge of the armature, which lead to the melt-wave erosion, even affects the movement of integrated projectile during launch. Furthermore, the physical mechanism behind these phenomenon is revealed, and the causes of muzzle velocity error are analyzed. In conclusion, a feasible, dynamic measurement method for multi-physics coupled environments is presented, which can provide references for follow-up modeling and simulation researches and promote the development of railguns.INDEX TERMS Electromagnetic railgun, multi-physics coupled environment, projectile-borne storage testing system, velocity skin effect

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Section: A Improvements Of Projectile-borne Storage Testing System 1) Minimizing Effects Of High Temperature Through Heat Insulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In-Bore Dynamic Measurement and Mechanism Analysis of Multi-Physics Environment for Electromagnetic Railguns

Yang

Dai

Yin³

et al. 2021

IEEE Access

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“…To overcome these problems, there are mainly two different approaches in the literature. Several researchers [9]- [11] built special FEM codes to model EMLs without using commercial software. However, these studies require specific knowledge of numerical computation.…”

Section: A Hybrid Simulation Model For Electromagneticmentioning

confidence: 99%

“…Especially for larger caliber launchers, the transient effect of the rail inductance becomes more dominant due the larger lateral rail current displacement. Then the EMF equation ( 4) should be reconsidered so that R backEMF should be modeled like (11) without the assumption that the armature is responsible the inductance change only. The deviation of the equivalent current path in an EML is analogous with a coil that is deformed as shown in Fig.…”

Section: A Emf Calculation R Backemfmentioning

confidence: 99%

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A Hybrid Simulation Model for Electromagnetic Launchers Including the Transient Inductance and Electromotive Force

Tosun

Polat

Ceylan

et al. 2020

IEEE Trans. Plasma Sci.

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Although electromagnetic launchers (EMLs) are superior to classical gun-powder-based launchers, they have to withstand extreme electrical and mechanical conditions. Therefore, the optimal design and precise simulations of these devices are crucial. In this article, a new simulation strategy for EMLs is proposed in order to achieve high accuracy and reduced complexity. The inductance and electromotive force (EMF) variations in the transient, which have a considerable influence on the launch process, are modeled using the finite element method (FEM) coupled with electrical circuit simulation. The proposed method has a good agreement with the experimental results of two EMLs (EMFY-1 and EMFY-2), which have 25-and 50-mm square bores and 3-m-length launchers. The study showed that the hybrid model with transient inductance and EMF calculations showed a good agreement with experiments that have 625 kJ-3.241-MJ input energies.

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Field‐circuit coupled analysis of an electromagnetic launcher sliding contact

Peng

Zhang

Zhai

et al. 2022

IEEJ Transactions Elec Engng

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Under the extreme working conditions of high-speed and high-current sliding electrical contact, if an electromagnetic launcher's rails and armature are not in good contact, transition ablation may occur, which will reduce the life of the rails. Though the transition state can be evaluated based on the muzzle voltage waveform, the conventional lumped circuit model does not take into account the strong coupling relationship of the multi-physical fields in the launching process-in particular, there is a lack of analysis of the melt wear of the armature. To overcome this challenge, a novel approach based on the field-circuit coupled method is proposed in this study to analyze the performance of armature-rail contact. First, the basic principle of the co-simulation model was introduced. The circuit model, the electromagnetic field model, the temperature field model, and the armature-rail contact force model were then built. Compared with the conventional circuit model, the field-circuit coupled model presented in this paper can better analyze the transient changes of the contact performance and obtain more details of multi-physical fields. Besides, the contact performance under different interference were compared through our proposed method. The method proposed in this study comprehensively considers the influence of the velocity skin effect, armature-rail interference assembly, and the melt wear of the armature on the performance of armature-rail contacts. The study can provide effective theoretical guidance for conducting performance analysis and designing the armature for an electromagnetic rail launcher.

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Numerical simulation of interior ballistic process of railgun based on the multi-field coupled model

Cited by 45 publications

References 8 publications

In-Bore Dynamic Measurement and Mechanism Analysis of Multi-Physics Environment for Electromagnetic Railguns

In-Bore Dynamic Measurement and Mechanism Analysis of Multi-Physics Environment for Electromagnetic Railguns

A Hybrid Simulation Model for Electromagnetic Launchers Including the Transient Inductance and Electromotive Force

Field‐circuit coupled analysis of an electromagnetic launcher sliding contact

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