超声频率和液位对空化场的影响
发布时间：2019-05-12 01:55
【摘要】：空化效应是超声在化学反应过程中发挥作用的主要原因,采用谱分析法衡量空化场强弱,引入标准差评价空化场的均匀程度,在标称频率20,k Hz和40,k Hz的清洗槽内,研究了超声频率和槽内液位对空化场的影响效果.结果表明:超声波换能器使用中存在频率漂移现象,利用水听器、示波器结合MATLAB软件测量计算实际工作频率分别为23.93,k Hz和42.72,k Hz;低频时空化场的平均强度高,但高频时空化场的均匀性更好;清洗槽内存在谐振液位(30,mm、45,mm、60,mm、75,mm),在这些液位处空化强度和均匀性均较好.
[Abstract]:Cavitation effect is the main reason why ultrasound plays an important role in the process of chemical reaction. Spectral analysis method is used to measure the strength of cavitation field, and standard deviation is introduced to evaluate the uniformity of cavitation field. In the cleaning tank of nominal frequency 20, k Hz and 40, k Hz, The effects of ultrasonic frequency and liquid level in the tank on the cavitation field were studied. The results show that there is frequency drift in the use of ultrasonic transducer. The actual working frequency is 23.93, k Hz and 42.72, k Hz; measured by hydrophone, oscilloscope and MATLAB software, respectively. The average intensity of low frequency space-time field is high, but the uniformity of high frequency space-time field is better, and there is resonance liquid level in cleaning tank (30 mm, 45 mm, 60 mm, 75 mm, mm), and the cavitation intensity and uniformity are better at these liquid levels.
【作者单位】： 天津大学化工学院;
【分类号】：O644.3
本文编号：2475017
[Abstract]:Cavitation effect is the main reason why ultrasound plays an important role in the process of chemical reaction. Spectral analysis method is used to measure the strength of cavitation field, and standard deviation is introduced to evaluate the uniformity of cavitation field. In the cleaning tank of nominal frequency 20, k Hz and 40, k Hz, The effects of ultrasonic frequency and liquid level in the tank on the cavitation field were studied. The results show that there is frequency drift in the use of ultrasonic transducer. The actual working frequency is 23.93, k Hz and 42.72, k Hz; measured by hydrophone, oscilloscope and MATLAB software, respectively. The average intensity of low frequency space-time field is high, but the uniformity of high frequency space-time field is better, and there is resonance liquid level in cleaning tank (30 mm, 45 mm, 60 mm, 75 mm, mm), and the cavitation intensity and uniformity are better at these liquid levels.
【作者单位】： 天津大学化工学院;
【分类号】：O644.3
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，本文编号：2475017
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