Small-scale pulsed-power applications

Gherendi, F.; Mandache, Nicolae Bogdan; Nistor, B.M.; Novac, B.M.; Enache, M.C.; Smith, I.R.; Stewardson, H.R.

doi:10.1109/ppc.1995.599774

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…Nevertheless, figure 13 makes it possible to determine a relationship between the parameter k and the distance D sensor . In agreement with other studies [26], the peak pressure attenuation k varies as D −1 sensor :…”

Section: Distance D Sensor Influencesupporting

confidence: 93%

Development of subsonic electrical discharges in water and measurements of the associated pressure waves

Touya¹,

Reess²,

Pécastaing³

et al. 2006

J. Phys. D: Appl. Phys.

127

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This paper first presents an experimental electrical and optical study of the development of an electrical discharge in water. The point–plane water gap is subjected to a 0.02 µs/350 µs impulse voltage. A Schlieren device associated with an image converter or a photomultiplier demonstrates that the discharge phenomenon requires heating of the water located around the extremity of the point. This thermal process leads to the formation of gas bubbles in which an electrical discharge propagates. In the experimental conditions a threshold value of 80 J is necessary to create bubbles. No UV or IR light emission is recorded before the presence of bubbles is detected. When the energy conditions are sufficient (⩾200 J), the volume of bubbles grows until the whole inter-electrode space is filled; then a breakdown of the gap occurs. When this happens, a high amplitude pressure shock wave is generated. In the second phase of this work the shock wave created by the gap breakdown was studied for energy levels up to 100 kJ. It is clearly pointed out that the pressure shock wave peak value depends on the energy remaining at breakdown time. For a constant remaining energy, the peak pressure value increases with increasing gap length.

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Section: Distance D Sensor Influencesupporting

confidence: 93%

Development of subsonic electrical discharges in water and measurements of the associated pressure waves

Touya¹,

Reess²,

Pécastaing³

et al. 2006

J. Phys. D: Appl. Phys.

127

View full text Add to dashboard Cite

show abstract

“…Numerous experimental studies are aimed at increasing the intensity of shock waves and revealing their dependence on the electrical parameters of the generator and the discharge, such as the energy in the supplying capacitor bank at the time of breakdown [16], the energy transferred to the discharge channel [17], the length of the discharge channel [18,19], or the distance from the channel [20,21]. Usually, on the basis of experimental data, a number of empirical dependencies are formulated that are subsequently the subject of theoretical research.…”

Section: Introductionmentioning

confidence: 99%

Pulsed high-current discharge in water: adiabatic model of expanding plasma channel and acoustic wave

Kozyrev¹,

Zherlitsyn²,

Semeniuk³

2022

Plasma Sci. Technol.

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This paper presents the results of a theoretical and experimental study of the use of a pulsed discharge in water to obtain a strong acoustic wave in a liquid medium. A discharge with a current amplitude of 10 kA, a duration of 400 ns, and an amplitude pulsed power of 280 MW in water at atmospheric pressure created an expanding acoustic wave with an amplitude of more than 100 MPa. To describe the formation of the discharge channel, an isothermal plasma model has been developed, which made it possible to calculate both the expansion dynamics of a high-current channel and the strong acoustic wave generated by it. Our calculations show that the number density of plasma in the channel reaches 10^20 cm^(–3), while the degree of water vapour ionization is about 10%, and the channel wall extends with a velocity of 500 m/s. The calculations for the acoustic wave are in good agreement with measurements

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