超声清洗装置空化噪声谱分析法空化噪声级测量

空化强度是用以衡量液体介质中空化活动的剧烈程度,同时空化效应在超声清洗中起关键作用,因此,测量超声清洗槽中的空化强度便可了解其中空化活动的情况.当发生空化时,液体介质中会产生成分复杂空化噪声,对空化噪声谱进行分析和计算得到空化噪声级,据此可判断空化强度.实验测得结果表明:超声清洗装置内稳态空化分布广泛、均匀,瞬态空化分...

Measurement of cavitation noise level by spectral analysis of cavitation noise in ultrasonic cleaning device

Cavitation intensity is used to measure the intensity of cavitation in liquid medium and cavitation effect plays a key role in ultrasonic cleaning, therefore, the cavitation activity can be known by measuring the cavitation intensity in the ultrasonic cleaning bath. When cavitation occurs, complex cavitation noise will be produced in liquid medium. The cavitation noise level can be obtained by analyzing and calculating the cavitation noise spectrum, then the cavitation intensity can be judged. The experimental results show that the steady cavitation distribution in the large ultrasonic cleaning device is extensive and uniform, and the transient cavitation distribution is concentrated; the steady cavitation and transient cavitation distribution in the small ultrasonic cleaning bath are uniform. The spatial average of cavitation noise level can better represent the overall cavitation intensity in the sound field environment of small ultrasonic cleaning tank; but for the sound field environment of large ultrasonic cleaning device, the spatial average of cavitation noise level can represent the steady cavitation intensity, and the transient cavitation intensity should be measured in the area where transient cavitation occurs.