ANALYSIS OF CYLINDRICAL PIEZOELECTRIC ACTUATOR USED IN FLOW CONTROL DEVICE

A design of cylindrical type piezoelectric actuator used in the flow control systems is proposed and analyzed in the paper. Traveling wave is generated on the top area of the actuator applying harmonic oscillations with different phases. Electrodes of piezoceramic elements are excited by harmonic voltage with phase difference of pi /3. Numerical modeling based on finite element method was performed to find resonant frequencies and modal shapes of the actuator and to calculate the trajectories of the upper points movements under different excitation schemes. Results of numerical and experimental studies are discussed.