< back to main site

Publications

Towards a reference ultrasonic cavitation vessel. Part 2 - investigating the spatial variation and acoustic pressure threshold of inertial cavitation in a 25 kHz ultrasound field.

Hodnett, M; Zeqiri, B (2008) Towards a reference ultrasonic cavitation vessel. Part 2 - investigating the spatial variation and acoustic pressure threshold of inertial cavitation in a 25 kHz ultrasound field. IEEE Trans. Ultrason. Feroelectr. Freq. Control, 55 (8). pp. 1809-1822.

Full text not available from this repository.

Abstract

As part of an ongoing project to establish a reference facility for acoustic cavitation at NPL, carefully controlled studies on a 25 kHz, 1.8 kW cylindrical vessel are described. Using a patented high frequency acoustic emission detection method, and a sonar hydrophone, results are presented of the spatial variation of acoustic cavitation with increasing peak-negative pressure. Results show that at low operating levels, acoustic cavitation is restricted to, and is strongly localised on, the vessel axis. At elevated power settings acoustic cavitation occurs at further locations in the vessel, and a spatial variation is seen that is not apparent in measurements of the 25 kHz driving field alone. At selected vessel locations, a systematic investigation of the inertial cavitation threshold is described, from which simultaneous measurements of the peak-negative pressures leading to inertial cavitation, and the resultant MHz-frequency emissions, indicate an inertial threshold of 84 ± 13 kPa.

Item Type: Article
Keywords: Cavitation, high power ultrasound, measurement, sonochemistry, sonoluminescence
Subjects: Acoustics
Acoustics > Ultrasound
Last Modified: 02 Feb 2018 13:15
URI: http://eprintspublications.npl.co.uk/id/eprint/4831

Actions (login required)

View Item View Item