결빙이 정찰용 무인기의 공력에 미치는 영향성에 관한 전산 해석

Abstract

When an aircraft encounters cloud layers with high humidity and sub-freezing temperatures, such as supercooled water droplets or ice particles, the aircraft's surface can undergo icing. Icing formation on an aircraft can lead to various issues, including reduced maximum lift coefficient, stall angle, and decreased controllability, which can potentially result in incidents and accidents. To prevent and mitigate these risks, the development of ice protection systems and research on icing phenomena are actively pursued worldwide. In this study, a three-dimensional compressible Reynolds-Averaged Navier-Stokes (RANS) equation was employed to perform computational analysis, focusing on investigating the impact of icing on reconnaissance UAVs. Additionally, a specialized computational fluid dynamics (CFD) analysis software, FENSAP-ICE, was utilized to predict the icing shapes. The icing conditions were determined based on the representative rime and glaze icing conditions specified in the continuous maximum (CM) conditions of FAR Appendix C by the Federal Aviation Administration (FAA). The exposure time for icing was set to 45 minutes. The findings of this study aim to be utilized in future icing certification for UAV development and the design of icing protection systems.