High power ultrasound impulses induced by wire-guided spark discharges in water

Research output: Contribution to conferencePaper

Abstract

Electrical discharges in liquid radiate Aide-band high power ultrasound (HPU) pulses which are the result of the initial expansion and later collapse of a transient plasma/vapor-filled cavity located between the high voltage and ground electrodes. The cavity may be formed by a process of a fast streamer breakdown, or by a slower Joule heating and evaporation mechanism which leads to the development of an initial inter-electrode gas bubble which subsequently breaks down. An alternative approach is to use fast Joule evaporation of a thin metallic wire placed between the electrodes. Compared with free discharge HPU sources this method could potentially provide a higher efficiency for the conversion of the electrical energy stored in the high-voltage, pulsed power supply into acoustic energy radiated into the liquid. This would be an advantage in practical applications of spark discharge HPU pulses. The present paper discusses the generation of acoustic pulses in water by wire-guided spark discharges.
Wire-guided spark discharges with energies up to 1 kJ have been generated by capacitor-based pulsed power circuitry in a plastic tank filled with tap water. A ball deformation gauge has been used to estimate the peak pressure in the acoustic pulses by measuring the acoustically-induced mechanical deformation of a copper sphere. The experimental results of the present study provide a general picture of the functional behavior of the peak pressure in the HPU pulses and will allow the optimization of the parameters of wire-guided spark discharges. This data could be of practical interest for the development of industrial applications of such discharges.

Conference

Conference16th IEEE International Pulsed Power Conference, 2007
CountryUnited States
CityAlbuquerque
Period17/06/07 → …

Fingerprint

electric sparks
impulses
wire
pulses
water
electrodes
acoustics
high voltages
breakdown
evaporation
cavities
Joule heating
taps
liquids
electric power
power supplies
balls
capacitors
bubbles
plastics

Keywords

  • high power
  • ultrasound impulses
  • wire-guided
  • spark discharges
  • water

Cite this

Timoshkin, I., MacGregor, S. J., Given, M. J., & Fouracre, R. A. (2007). High power ultrasound impulses induced by wire-guided spark discharges in water. 33-36. Paper presented at 16th IEEE International Pulsed Power Conference, 2007 , Albuquerque, United States. https://doi.org/10.1109/PPPS.2007.4651784
Timoshkin, I. ; MacGregor, S.J. ; Given, M.J. ; Fouracre, R.A. / High power ultrasound impulses induced by wire-guided spark discharges in water. Paper presented at 16th IEEE International Pulsed Power Conference, 2007 , Albuquerque, United States.3 p.
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keywords = "high power , ultrasound impulses, wire-guided, spark discharges, water",
author = "I. Timoshkin and S.J. MacGregor and M.J. Given and R.A. Fouracre",
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note = "16th IEEE International Pulsed Power Conference, 2007 ; Conference date: 17-06-2007",

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Timoshkin, I, MacGregor, SJ, Given, MJ & Fouracre, RA 2007, 'High power ultrasound impulses induced by wire-guided spark discharges in water' Paper presented at 16th IEEE International Pulsed Power Conference, 2007 , Albuquerque, United States, 17/06/07, pp. 33-36. https://doi.org/10.1109/PPPS.2007.4651784

High power ultrasound impulses induced by wire-guided spark discharges in water. / Timoshkin, I.; MacGregor, S.J.; Given, M.J.; Fouracre, R.A.

2007. 33-36 Paper presented at 16th IEEE International Pulsed Power Conference, 2007 , Albuquerque, United States.

Research output: Contribution to conferencePaper

TY - CONF

T1 - High power ultrasound impulses induced by wire-guided spark discharges in water

AU - Timoshkin, I.

AU - MacGregor, S.J.

AU - Given, M.J.

AU - Fouracre, R.A.

PY - 2007

Y1 - 2007

N2 - Electrical discharges in liquid radiate Aide-band high power ultrasound (HPU) pulses which are the result of the initial expansion and later collapse of a transient plasma/vapor-filled cavity located between the high voltage and ground electrodes. The cavity may be formed by a process of a fast streamer breakdown, or by a slower Joule heating and evaporation mechanism which leads to the development of an initial inter-electrode gas bubble which subsequently breaks down. An alternative approach is to use fast Joule evaporation of a thin metallic wire placed between the electrodes. Compared with free discharge HPU sources this method could potentially provide a higher efficiency for the conversion of the electrical energy stored in the high-voltage, pulsed power supply into acoustic energy radiated into the liquid. This would be an advantage in practical applications of spark discharge HPU pulses. The present paper discusses the generation of acoustic pulses in water by wire-guided spark discharges. Wire-guided spark discharges with energies up to 1 kJ have been generated by capacitor-based pulsed power circuitry in a plastic tank filled with tap water. A ball deformation gauge has been used to estimate the peak pressure in the acoustic pulses by measuring the acoustically-induced mechanical deformation of a copper sphere. The experimental results of the present study provide a general picture of the functional behavior of the peak pressure in the HPU pulses and will allow the optimization of the parameters of wire-guided spark discharges. This data could be of practical interest for the development of industrial applications of such discharges.

AB - Electrical discharges in liquid radiate Aide-band high power ultrasound (HPU) pulses which are the result of the initial expansion and later collapse of a transient plasma/vapor-filled cavity located between the high voltage and ground electrodes. The cavity may be formed by a process of a fast streamer breakdown, or by a slower Joule heating and evaporation mechanism which leads to the development of an initial inter-electrode gas bubble which subsequently breaks down. An alternative approach is to use fast Joule evaporation of a thin metallic wire placed between the electrodes. Compared with free discharge HPU sources this method could potentially provide a higher efficiency for the conversion of the electrical energy stored in the high-voltage, pulsed power supply into acoustic energy radiated into the liquid. This would be an advantage in practical applications of spark discharge HPU pulses. The present paper discusses the generation of acoustic pulses in water by wire-guided spark discharges. Wire-guided spark discharges with energies up to 1 kJ have been generated by capacitor-based pulsed power circuitry in a plastic tank filled with tap water. A ball deformation gauge has been used to estimate the peak pressure in the acoustic pulses by measuring the acoustically-induced mechanical deformation of a copper sphere. The experimental results of the present study provide a general picture of the functional behavior of the peak pressure in the HPU pulses and will allow the optimization of the parameters of wire-guided spark discharges. This data could be of practical interest for the development of industrial applications of such discharges.

KW - high power

KW - ultrasound impulses

KW - wire-guided

KW - spark discharges

KW - water

U2 - 10.1109/PPPS.2007.4651784

DO - 10.1109/PPPS.2007.4651784

M3 - Paper

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ER -

Timoshkin I, MacGregor SJ, Given MJ, Fouracre RA. High power ultrasound impulses induced by wire-guided spark discharges in water. 2007. Paper presented at 16th IEEE International Pulsed Power Conference, 2007 , Albuquerque, United States. https://doi.org/10.1109/PPPS.2007.4651784