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Development and verification of a conformal electrothermal deicing functional structure for the leading edge of the airfoil

  

  • Received:2022-07-29 Revised:2022-09-26 Online:2022-09-30 Published:2022-09-30

Abstract: Aiming at the problem of preventing and deicing the leading edge of aircraft wing, a lightweight, high-efficiency, low energy consumption, conformal graphene composite material for aircraft wing leading edge electrothermal deicing functional struc-ture is designed and experimentally verified. Adopting the design scheme of integrating the graphene heating film and the composite material laminate structure, a 0.75mm thick graphene composite material electrothermal deicing conformal heater is cured by in-situ bonding on the leading edge of the aircraft wing using the self-developed thermoforming equipment; The heating uniformity and stability of the conformal heater are verified by comparing the temperature rise of the conformal heater under room and low temperature environments with the same power density; The ice layer with controllable shape and thickness is prepared on the surface of the leading edge of the aircraft wing by an in-situ conformal icing method, and the deicing performance of the heater under different power densities is tested. Finally, a comparative analysis is made with the traditional airfoil leading edge wire conformal electrothermal deicing structure. The test results show that the conformal bonding between the conformal heater and the leading edge of the airfoil is of good quality; With the continuous increase of power density, the deicing time of the conformal heater is shortened, and the deicing effect is better; when the power density is 15kW/m2, the bottom interface ice layer can be completely melted within 40s. On the premise of achieving the same de-icing effect, the power density required by the new electrothermal deicing structure is significantly lower than that of the traditional airfoil leading edge metal wire conformal electrothermal deicing structure. The graphene composite conformal heater based upon the leading edges of wings is a promising solution for elector-thermal deicing in terms of both good con-formal and deicing effects.

Key words: Elector-thermal deicing, In situ conformal, Graphene composites, leading edge, Functional structure

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