전진비 및 수직 분리에 따른 Side-by-Side UAM 항공기 간 후류 조우 특성 연구

초록

Tip vortices generated at the tips of fixed wings or rotor blades propagate downstream and can affect the inflow of a following aircraft, leading to unsteady aerodynamic loads and flight stability. For urban air mobility (UAM) vehicles, multi-rotor wakes are more complex, which makes it difficult to directly apply separation criteria developed for conventional fixed-wing or rotorcraft operations. This study examines wake encounter characteristics of UAM vehicle in full-configuration and investigates the wake interaction phenomena with respect to changes in advance ratio and vertical separation distance. In this study, a vortex-based in-house solver combining a nonlinear vortex lattice method, a source doublet panel method, and a vortex particle method is employed and its capability is validated by comparing the predicted wake trajectory of the ROBIN model with available experimental results. Subsequently, for two side-by-side UAM vehicles in forward flight, the aerodynamic performance is quantitatively assessed by examining the thrust and moment fluctuations of the following aircraft for varying advance ratios and vertical separation distances

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