【摘要】 提出了一种用于分析超声空化声场的分离法,应用该方法研究了低频超声清洗声场,并和常用的谱级分析法进行比较。结果表明该分离法能直观地反映出空化的强弱,可以较细致地对瞬态空化和稳态空化进行比较分析,而且便于对空化声场的非线性过程进行更深入地了解,这对于研究声能量对物质的作用机制具有一定意义,此外也表明Frohly等人在研究了高频超声空化声场后所得出的表征空化活动强弱的指标同样适用于评判低频超声场。更多还原

【Abstract】 A separation method used to analyze ultrasonic cavitation fields is described. The method is applied to investigate low-frequency ultrasonic fields for cleaning, and compared with the spectral level analysis method. The results show that the described method can provide cavitation intensity more straightforwardly, allow more detailed analysis to both transient and stable cavitation, and provide insight into the non-linear process of cavitation. The method is useful in understanding the mechanism of ultrasonic effects on substances. Moreover, it is suggested that the criterion for characterization of cavitation intensity presented by Frohly based on his study on high-frequency ultrasonic fields is also applicable to low-frequency ultrasonic fields.更多还原