摘要
在超声波降解有机物溶液过程中,超声空化产生的高温高压以及空化泡振荡产生的激波在有机物溶液的降解中发挥重要作用.本文通过对超声波作用下气泡动力学的研究,讨论了超声波声压、频率、气泡初始半径等参量对有机物溶液降解效率的影响.研究发现,存在使降解效率极大的声压和频率。在空化稳定的情况下,存在一个使降解效率极大的气泡初始半径,降解效率随着黏滞系数的增大而减小。研究还发现,双频超声作用的空化效果比单频超声作用时强,与双频超声作用下有机物溶液降解率较大这一实验结果一致。
It has been found that high pressur, high temperature and shock wave during cavitaing bubble collapse induced by ultrasonic signal have evident effect at the process of ultrasonic degrading organic liquor. The investigation indicates that we can find out the best pressure and frequency for obtaining the maximal degrading efficiency in the range of steady cavitation. Cavitating bubble can keep on a steady vibration in a given original radius. The maximum of cavitation can be obtained at the best original radius. Degrading efficiency has an inverse ratio relationship with viscosity. The investigation also indicates that dual-frequency ultrasonic signal is much more efficient than single- frequency ultrasonic signal, the result is in agreement with the experiment basically.
出处
《声学学报》
EI
CSCD
北大核心
2009年第2期180-186,共7页
Acta Acustica
基金
国家自然科学基金(10574071
10874088)资助项目
