The Investigation of Hollow Hemisphere-Shape Actuator
P. Vasiljev1, R. Bareikis1,2, S. Borodinas1,2, A. Struckas1, J. Kasperoviciene3
1 Lithuanian University of Educational Sciences, Vilnius, Lithuania
2 Vilnius Gediminas Technical University, Vilnius, Lithuania
3 Institute of Botany, Vilnius, Lithuania
In this paper we are investigating two possible excitation methods of how to simultaneously excite two vibration types – longitudinal and radial. The first method – is to glue the PZT element to a specifically prepared surface area of the hemisphere. The second way is to connect the hemisphere to a Langevin type longitudinal transducer. For both cases we did modeling to find eigen frequency as well as harmonic analysis in a lower ultrasonic frequency range (20-30kHz). Impedance-frequency characteristic and mechanical vibration amplitudes are measured around resonant frequency. Comparative tests for both systems are performed using proposed actuators for algae ultra-sonication for bio-fuel production. We have determined the relation of longitudinal and radial waves that are traveling from the excitation source to a hemisphere opposite end. The prototypes of proposed systems are designed and manufactured. Comparative algae destruction results are obtained.
ACTUATOR 2016 Manuscript P 02
Publication date: 01/06/2016
Manuscript P 02 published in Conference Proceedings ACTUATOR 2016
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