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A supersonic underwater discharge as a high-power ultrasound source

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journal contribution
posted on 01.03.2021, 11:24 by Jessica Stobbs, Bucur Novac, Peter Senior, Matthew Woodyard, Paul Lepper
IEEE A supersonic underwater discharge system, driven by a pulsed power generator with 235 ns voltage rise time was developed to be used as a powerful ultrasound source. The paper presents details of the system’s components and the various diagnostic methods used, together with the main findings obtained during the first experimental campaign. The system generated a peak pressure of 184 kPa at 1 m distance, with an efficiency of energy conversion from electrical to acoustic estimated as 0.8%. The pressure profile was found to display a resemblance to the radiation pattern generated by a dipole antenna. Using an ultrahigh speed camera, a study of the inter-electrode discharge revealed details of the pre-breakdown streamer dynamics and an estimate for the lifetime of the post-breakdown plasma column. The way forward includes testing the system at a very high repetition rate.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

Volume

68

Issue

6

Pages

2294-2302

Publisher

IEEE

Version

AM (Accepted Manuscript)

Rights holder

© IEEE

Publisher statement

Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Acceptance date

20/01/2021

Publication date

2021-01-27

Copyright date

2021

ISSN

0885-3010

eISSN

1525-8955

Language

en

Depositor

Prof Bucur Novac. Deposit date: 27 February 2021

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