Unsteady Wake Dynamics and Rotor Interactions: A Canonical Study for Quadrotor UAV Aerodynamics Using LES

The M.Tech project aims to enhance the flight stability, control, and overall performance of quadrotor Unmanned Aerial Vehicles (UAVs) through the analysis of unsteady aerodynamic behavior in problematic operational scenarios. This study focuses on the specific aerodynamic issues and mechanisms of robust local inflow velocity fluctuations within tightly spaced multirotor systems, considering the presence of coherent tip vortex streets in the helical configuration of the rotor blades. These vortex structures present severe aerodynamic interactions with downstream and adjacent rotors, resulting in the transient variability of lift, increased vibratory loads, and heightened noise levels. This project applies a holistic computational approach to the analysis of rotor interactions and wake dynamics using

Large-Eddy Simulation (LES). This approach helps describe the mechanisms of tip vortex generation and the phenomena of Blade-Vortex Interaction (BVI) that drive the variability of lift and aerodynamic loads. Optimized LES is designed to capture the wake structures and their effects on adjacent rotors, revealing unsteady aerodynamics. Although RANS and URANS models have provided information on the subject, their representation remains insufficient. The project seeks to analyze and describe the vortex-street offset distance and wake instability to various design and operational parameters through computational models. The aim is to establish the multirotor wake dynamics as a physically correct representation within advanced aerodynamic assessments of UAVs. This study aims to establish

a robust predictive tool of LES for advanced UAV aerodynamic assessments.

Message: Hi FE, I need help with “Unsteady Wake Dynamics and Rotor Interactions: A Canonical Study for Quadrotor UAV Aerodynamics Using LES” in “Aerospace Engineering”