Threshold Investigation of Ultrasonic Cavitation in Supercritical Fluid CO2

Journal of South China University of Technology (Natural Science Edition) ›› 2005, Vol. 33 ›› Issue (12): 100-104.

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Threshold Investigation of Ultrasonic Cavitation in Supercritical Fluid CO₂

Yang Ri-fu¹ Qiu Tai-qiu² Luo Deng-lin²

1.College of Physical Science and Tech.,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China;2.Research Institute of Light Industry&ChemicM Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China

Received:2005-06-13 Online:2005-12-25 Published:2005-12-25
Contact: 杨日福(1969-)，男，副教授，主要从事超声技术及其应用研究 E-mail:yangrifu@scut.edu.cn
About author:杨日福(1969-)，男，副教授，主要从事超声技术及其应用研究
Supported by:
华南理工大学自然科学基金资助项目(123E5040890)

Abstract

Abstract:

Aiming at exploring the possibility of the formation of ultrasonic cavitation in supercritical fluid CO₂,the laws of cavitation threshold varying with the original radius of cavitation bubble,the pressure and the temperature were investigated,based on the basic theory of cavitation threshold and the thermophysical values of supercritical fluid CO₂.The results indicate that(1)the threshold of ultrasonic pressure PB and the threshold of ultrasonic inten-sity,B in supercritical fluid CO₂ decrease with the increase in the original radius;(2)higher pressure and lower temperature are propitious to ultrasonic cavitation;and(3)the theoretical cativation threshold in supercritical fluid CO₂ is lower than the theoretical and actual ones in water.

Key words: supercritical fluid CO₂, ultrasound, cavitation threshold, pressure, temperature

Yang Ri-fu Qiu Tai-qiu Luo Deng-lin. Threshold Investigation of Ultrasonic Cavitation in Supercritical Fluid CO₂[J]. Journal of South China University of Technology (Natural Science Edition), 2005, 33(12): 100-104.

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Threshold Investigation of Ultrasonic Cavitation in Supercritical Fluid CO₂

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