Vibration de-icing method with piezoelectric actuators on airfoil surface

This paper presents the theoretical and experimental research on a de-icing method with the piezoelectric transducer as the actuator.The work is conducted on an airfoil surface.Based on the planar point data of the airfoil finite element model,a method for calculating the suitable area on which the piezoelectric actuators can paste is presented,and an algorithm for calculating the normal vec-tors and tangent vectors of a point on the airfoil surface using a combination of five-point formula and four-point formula is designed.The placement of piezoelectric actuators is studied.The re-sults show that on the airfoil surface,the excitation of the piezoelectric actuators decreases with the increase of the distance between two actuators,and the maximum excitation takes place when the actuators are placed near the position of the vibration wave crest.Under the premise of the constant paste contact area,the excitation of the actuators is weakened with the increase of the relative actuator number.Meanwhile,the higher the concentration of the piezoelectric actuator is,the better the excitation is.The de-icing experiments got good results,and the power con-sumption was about 69.77W·m-2 ,which is lower than that of electro-thermal de-icing method.