Year: 2026
Type: article
Abstract: Low observable aircraft have a S-Duct to reduce RCS at the engine face.The S-Duct causes flow separation due to curvature, resulting secondary flow affects the performance of the turbofan engine.In this study, a three-dimensional CFD analysis of UAV S-Duct was performed to investigate internal flow according to the curvature, section geometry changes in S-Duct.In addition, jet injection was applied as a way to reduce secondary flow in the duct.The performance of the duct was evaluated in terms of total pressure recovery and distortion coefficient.The computational results show that the performance is better when the curvature point is located rearward than the baseline and the airflow distortion is significantly reduced with jet injection. 초 록저피탐 항공기들은 엔진 입구면(AIP)에서의 레이더 반사량을 감소시키기 위해 S형 흡입구를 적용한다.S형 흡 입구는 곡률에
Authors: Jihan Song, Kidong Kim
Institution: Agency for Defense Development
Language: English
Subfield: Computational Mechanics
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W7160851625