Numerical simulation and validation of ultrasonic de-icing system

This work presents the analytic and experimental research of de-icing method with piezoelectric transducer as actuators. For the reason of flight conditions like altitude, high and humidity. To meet the requirements for flight, deicing measures must be taken in consideration. There are lots of existing deicing methods, but the main problem is that the loss of power with them is very big increasing the consumption of fuel and decreasing the efficiency of the flight. With the development of piezoelectric ceramic technology, shear vibration deicing is more concerned for their low power consumption. Shear stress between surface and ice is generated by the forced vibration which is driven by piezoelectric. The device achieves the deicing purpose activating resonant frequencies of a structure using piezoelectric ceramic actuators to generate enough shear stress at the interface, between the surface and ice, to break the adhesion stress between them. In this study, we study the effect of shear stress generated for different distances between ceramic piezoelectric, and then analyze the relations of the shear stress and frequency. First, a numerical method was validated to assist the design of such systems. Numerical simulations were performed for the case of a flat plate testing the natural modes and harmonic response by the software ANSYS, which proves the feasibility to remove ice by piezoelectric ceramic actuator in theory. And then, validated experimentally. The model was then used to study important design parameters such as actuator positioning and the distance between them