Characterization of cavitation in a flow-through exposure chamber by means of a resonant bubble detector

摘要: Abstract Ultrasonic cavitation at frequencies of 0.514, 0.866, 1.03 and 1.61 MHz in water flowing through tubes was observed by counting bubbles downstream with a resonant bubble detector (RBD) operated 0.89 or 1.7 MHz. In 21 mm diameter, thin-walled tube, thresholds tap 5.3 cm s −1 ranged from 2.0 – 2.5 bar 0.514 to 3 4 When high speed injections were employed trigger the ultrasonic hydrodynamically-generated bubbles, reduced about 2 production enhanced for exposures. radiation forces on coalescence appeared cause, under some conditions, reduction counts during subthreshold exposures when injected into flow. The RBD method is useful tool detecting semi-quantitatively observing flow-through exposure system.