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Towards a reference cavitating vessel Part III - design and acoustic pressure characterization of a multi-frequency sonoreactor.

Wang, L S; Memoli, G; Hodnett, M; Butterworth, I; Sarno, D; Zeqiri, B (2015) Towards a reference cavitating vessel Part III - design and acoustic pressure characterization of a multi-frequency sonoreactor. Metrologia, 52 (4). pp. 575-594.

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Abstract

A multi-frequency cavitation vessel (RV-multi) has been commissioned at NPL, with the aim of establishing a standard source of acoustic cavitation in water, against which measurement techniques may be tested. The vessel is a cylindrical cavity with a maximum capacity up to 17 litres, and is designed to work at six frequency ranges, from 21 kHz to 136 kHz, under controlled temperature conditions. This paper discusses the design of RV-multi and reports experiments carried out to establish the repeatability of the acoustic pressure field established within the vessel and its operating envelope, including sensitivity to aspects such as water depth and temperature. The acoustic field distribution was determined along a number of selected directions within the vessel, using a miniature hydrophone, for two input voltage levels under linear transducer excitation conditions (e.g. below the cavitation threshold). Particular care was taken in determining peak acoustic pressure locations, as these are critical for accompanying cavitation studies. Perturbations of the vessel by the measuring hydrophone were also monitored with a bottom mounted pressure sensor.

Item Type: Article
Keywords: sonoreactor, modal analysis, cavitation
Subjects: Acoustics
Acoustics > Ultrasound
Identification number/DOI: 10.1088/0026-1394/52/4/575
Last Modified: 02 Feb 2018 13:13
URI: http://eprintspublications.npl.co.uk/id/eprint/6764

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