Abstract
This paper presents the design and analysis of a Langevin Ultrasonic Transducer for Acoustic Cavitation Generation (LUTACG) operating under acoustic load. When an ultrasonic transducer is used with acoustic loads its Impedance-Frequency-Phase (IFP) characteristics change. The changes produced in its frequency response are very large and require a readjustment in the control of the resonance frequency as well as the magnitude of the voltage. In this work, a study of the effects of the load type on the impedance-phase relation is made. Experimental tests to study the changes produced in the frequency response were performed in air, water and transformer oil. The different factors that should be taken into consideration in the numerical simulation for a good mechanical-acoustic design are analyzed. Characteristics such as geometry, acoustic impedance, resonance frequency and phase which the ultrasonic transducer and sonotrode must have for proper operation under an acoustic load are analyzed. A simple and economical method is used for the electrical characterization of the transducer. An analysis of the effect of the acoustic impedance between the different interfaces and as they affect the acoustic efficiency of the transducer is made.
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