期刊
CHEMICAL ENGINEERING SCIENCE
卷 56, 期 5, 页码 1831-1840出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0009-2509(00)00460-7
关键词
cavitation bubbles; ultrasound; phase-Doppler; laser technique; acoustic streaming
An experimental study about the velocity, size and concentration of ultrasonic cavitation bubbles is presented. Ultrasound is provided from a 20 kHz horn dipping vertically into a liquid container. Using the laser phase-Doppler technique, cavitation bubble velocity and size distributions are obtained at various locations inside the ultrasound field. Axial and radial profiles of average bubble velocity, mean diameters and volumetric flow rate are presented. The influence of ultrasound power input is also investigated: it increases bubble velocity quasi-linearly and has more complex effect on bubbles diameter. The system investigated possesses similar hydrodynamic properties with typical turbulent circular jet flows. (C) 2001 Published by Elsevier Science Ltd.
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