A Study on the Performance Variation of a Transonic Axial Fan Blade Due to Leading Edge Dent Damage

Foreign Object Damage (FOD) introduces external materials into the engine and can cause problems to fan blades in various forms.In this study, the aerodynamic performance loss caused by leading-edge dent damage on an axial fan blade was investigated using a baseline and three damaged models based on the NASA Stage 67 fan.The damaged configurations exhibited a maximum decrease of 1.2% in choking mass flow rate, 4.2% in total pressure ratio, and 5.4 percentage points in efficiency.Performance loss became more as the dent location moved from the hub toward the tip.This study presents the impact of dent damage on fan aerodynamic performance, providing damage limits and maintenance criteria in real engine.초 록 FOD(Foreign Object Damage)는 외부에서 들어오는 물질로 엔진 블레이드에 다양한 형태로 치명적인 문제 를 일으킨다.본 연구에서는 축류 팬 블레이드의 앞전에 발생한 함몰(Dent) 손상이 공력 성능에 미치는 영향을 NASA Stage 67을 기반으로 기준 모델과 결함 위치에 따른 3가지 손상 모델(허브, 미드, 팁 위치)을 구성하여 전산 해석을 수행하였다.분석 결과 손상 케이스에서 쵸킹 유량은 최대 1