Akademik Veri Yönetim Sistemi
International Conference on Liutex-Based Vortex Identification Methods, ICLVIM 2024, Suzhou, Çin, 9 - 11 Ağustos 2024, cilt.430 SPPHY, ss.86-98, (Tam Metin Bildiri)
Wing rock is a lateral directional instability that seriously challenges aircraft stability, handling qualities, and safety. Therefore, much effort has been dedicated to deciphering this phenomenon's causative flow physics. Traditional methods for vortex identification have limitations in fully capturing the intricate dynamics of underlying flow mechanisms responsible for wing rock instability. The current study, therefore, evaluates the Liutex-based third-generation vortex identification method for flow analysis of a fixed rectangular wing Micro Aerial Vehicle (MAV), Slender Delta Wing, and blended-wing-body (BWB) configuration to highlight its effectiveness in analyzing the vortex-dominated flows driving wing rock phenomenon. Rigorously validated computational frameworks based on the rigid body free-vibration method in single roll degree of motion employing three-dimensional unsteady Reynolds’ Average Navier Stokes equations were utilized for wing rock analysis of all the cases. Liutex analysis presented detailed flow visualization to reveal that interactions between side-tip vortices, the separation bubble, and dynamic lag in side-edge vortices contribute to wing rock instability for rectangular wings. For the BWB configuration, Liutex successfully identified interactions between the complex vortex system and separated wingtip flow. By applying Liutex-based flow analysis to these configurations, the research demonstrates its utility for comprehensive visualization of complex vortical flows, facilitating a better understanding of the underlying flow mechanisms responsible for wing rock.