Design and Fabrication of a High-Intensity Ultrasonic Transducer for Food Dehydration

Authors: Phạm Huy Tuân*, Nguyễn Xuân Quang, Nguyễn Ngọc Phương


Ultrasonic transducer with high vibration amplitude and large ultrasonic field has drawn considerable attention from various industries. In the field of food dehydration, a number of high-power ultrasonic transducers with extensive radiators have been proposed and used to dry heat sensitive materials and high-quality dry products. Nevertheless the design methodology for those devices is still a troublesome process and have not been widely published. In this research, an effective design method of a new i-stepped plate ultrasonic transducer was developed by using a genetic algorithm optimization scheme and finite element analyses. Based on the optimum designs, prototypes of the transducer were fabricated by a numerical control machining process. The effect of the ultrasonic field generated by the proposed design was investigated via a drying experiment of carrots which showed a considerable reduction in the drying time compared to the traditional method


i-stepped plate, high-intensity ultrasonic, transducers, extensive radiator.
Pages : 121-126

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