Maximisation of cavitation intensity in ultrasonic cleaning in aqueous solutions through selection of salt solution

摘要

The purpose of the work was to compare cavitation intensities of solutions of various salts with cavitation of water in order to identify that some solutions cavitate more intensely than water and this might be applied in practice. Cavitation intensities at an ultrasonic frequency of 26 kHz in tap water and in thirty-five 3% aqueous solutions of selected inorganic salts were compared, as well as in tap water and in twenty-four 3% solutions of inorganic salts at 38 kHz and at 50℃. It was found that at 38 kHz many salt solutions cavitate more intensely than water and some of them cavitate considerably more intensely. At 26 kHz only one such salt was found. At both frequencies and 50℃, some of salt solutions cavitate much less intensely than water.