항공기 방빙 장치 적용을 위한 알루미늄 합금의 비습윤 전열 표면에 대한 연구

Abstract

According to Aircraft Owners and Pilots Association (AOPA) research of aviation accidents, icing problem account for 12 % of all aviation accident cases in all meteorological environments. Various de-icing and anti-icing technology (e.g., TKS system and Pneumatic boots) have been researched to prevent these freezing accidents. Among them, electrothermal de-icing technology has recently been widely used due to its excellent de-icing efficiency. However, the existing electrothermal de-icing technology exhibits low efficiency of energy consumption and limitations in applicability due to the installation of additional parts. Therefore, research on electrothermal de-icing technology having high energy efficiency and applicability is required. In this study, de- wetting electrothermal surface was formed on Al alloy, which is widely used as an aircraft material. Anodization was performed on the aluminum alloy to form a thick oxide film, thereby reducing the heat loss and getting an insulation effect. After that, the silver flakes were pasted by screen printing to form an electrothermal layer through an Ag electrode layer on the surface, and the mobility of droplets was maximized by performing a superhydrophobic surface treatment. The Ag electrode layer’s surface morphology and cross-sectional image were observed using a scanning electron microscope (SEM), and the contact angle and the contact angle hysteresis were measured to confirm water repellency. And to confirm de-/anti- icing properties, we tested de-icing and anti-icing test.