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超临界CO2流体中超声空化阈值的研究
引用本文:杨日福,丘泰球,罗登林.超临界CO2流体中超声空化阈值的研究[J].华南理工大学学报(自然科学版),2005,33(12):100-104.
作者姓名:杨日福  丘泰球  罗登林
作者单位:华南理工大学,物理科学与技术学院,广东,广州,510640;华南理工大学,轻化工研究所,广东,广州,510640
基金项目:华南理工大学自然科学基金资助项目(123E5040890)
摘    要:为了研究超临界CO2流体中超声空化产生的可能性,根据超声空化阈值的基本理论和超临界CO2流体的物态数值,研究了超声空化阈值随空化泡初始半径、流体压力和温度的变化规律.结果表明:超临界CO2流体中超声阈值声压PB、阈值声强IB随空化泡的初始半径增大而减少;对超临界CO2流体,当压力较大或温度较低时,更容易产生空化;在空化泡初始半径相同的情况下,超临界CO2流体中的理论空化闽值比水中的理论和实际空化阈值均要低.

关 键 词:超临界CO2流体  超声  空化阈值  压力  温度
文章编号:1000-565X(2005)12-0100-05
收稿时间:2005--06--13
修稿时间:2005年6月13日

Threshold Investigation of Ultrasonic Cavitation in Supercritical Fluid CO2
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.
Authors:Yang Ri-fu  Qiu Tai-qiu  Luo Deng-lin
Abstract:Aiming at exploring the possibility of the formation of ultrasonic cavitation in supercritical fluid CO_2,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 CO_2.The results indicate that(1) the threshold of ultrasonic pressure p_B and the threshold of ultrasonic intensity I_B in supercritical fluid CO_2 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 CO_2 is lower than the theoretical and actual ones in water.
Keywords:supercritical fluid CO2  ultrasound  cavitation threshold  pressure  temperature
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