An Indirect Iterative Method to Couple the Generator to the MHD Load for Future Z-Pinch

Zhou, Quan; Zou, Xiaobing; Wang, Xinxin

doi:10.1109/tps.2020.3010961

Cited by 4 publications

(1 citation statement)

References 15 publications

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“…The time-dependent resistance and inductance of each wire can be calculated by the Joule-heating power and magnetic energy obtained from the MHD model, respectively [20]. At this point, the Circuit-MHD two-way coupling model was established, allowing the self-consistent analysis for the whole wire array electrical explosion system shown in figure 1.…”

Section: Numerical Modelmentioning

confidence: 99%

Unbalanced distribution of electric current in underwater electrical wire array explosion

Liu¹,

Diao²,

Xu³

et al. 2022

J. Phys. D: Appl. Phys.

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The uniformity of electric current distribution in a wire array and its unstable behavior during the process of underwater electrical explosion have been investigated. Two exploding wires in parallel were used in the experiments and the current waveforms flowing through each wire were obtained using two self-integrating coils. Significant differences in the current waveforms of the two wires were observed near the melting point, which was attributed to the non-simultaneity of heating and phase transition. Unbalanced current distribution caused by the deviations of wire dimensions was analyzed based on a magneto-hydrodynamic model, and the simulation results show that thermodynamic state difference between two wires is present throughout the entire electrical explosion process. It is also found that the initial stored energy of pulse generator will affect the thermodynamic state evolution of exploding wires, resulting in different behaviors of current distribution after the explosion time. The slightly different heating rate caused by unbalanced current distribution in a wire array can break the symmetry of converging shock waves and lower the pressure peak in the vicinity of implosion axis, which was discussed based on the two-dimensional hydrodynamic simulations.

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Section: Numerical Modelmentioning

confidence: 99%

Unbalanced distribution of electric current in underwater electrical wire array explosion

Liu¹,

Diao²,

Xu³

et al. 2022

J. Phys. D: Appl. Phys.

Self Cite

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Electrothermal instability in different modes of underwater electrical wire explosion

Liu,

Li,

Wang

et al. 2023

Journal of Applied Physics

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Electrothermal instability and its effect on the uniformity of discharge channels during underwater electrical wire explosions at different energy deposition rates have been investigated. According to the liquid–vapor transition mechanism, we classified underwater electrical explosion into “phase explosion mode” and “supercritical mode.” Two sets of experiments corresponding to the two modes were conducted, and the exploding wires were observed by a shadow imaging system. Results showed that a bamboo-shaped discharge channel was formed in the phase explosion mode, whereas the discharge channel in the supercritical mode was a uniform cylinder. Self-consistent magnetohydrodynamic simulation results indicated that exploding wires transfer into liquid–vapor coexistence phase in the phase explosion mode, accompanied by a rapid increase in the density perturbation and the formation of bamboo-shaped structures. Moreover, a small perturbation model was derived to analyze the electrothermal instability in different thermodynamic states. It was indicated that the density perturbation is easier to grow in the liquid–vapor coexistence state than the supercritical state, which provides a theoretical explanation for the differences between the two electrical explosion modes.

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Computational Investigations on the Four-Stage MA-Class Fast Linear Transformer Driver With Sharing Cavity Shell

Qiu

Wang

Sun

et al. 2021

IEEE Trans. Plasma Sci.

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An Indirect Iterative Method to Couple the Generator to the MHD Load for Future Z-Pinch

Cited by 4 publications

References 15 publications

Unbalanced distribution of electric current in underwater electrical wire array explosion

Unbalanced distribution of electric current in underwater electrical wire array explosion

Electrothermal instability in different modes of underwater electrical wire explosion

Computational Investigations on the Four-Stage MA-Class Fast Linear Transformer Driver With Sharing Cavity Shell

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