LBM 해석을 이용한 전기체 쿼드콥터 UAM 항공기의 로터-로터 간섭현상 분석

초록

This study examines the aerodynamic and acoustic effects of rotor interference in a quadrotor-type UAM vehicle, specifically focusing on changes in the rear rotor arm angle. Aerodynamic simulations were performed using the commercial LBM-based software PowerFLOW, while the acoustic analysis utilized an acoustic analogy method based on the impermeable surface Ffowcs Williams–Hawkings formulation. The findings reveal that the interaction between the front and rear rotors varies with the rear rotor's position, exhibiting stronger interference as the rear rotor height increases. At a rear rotor arm angle of θ = 20°, significant unsteady loads were observed in the front rotor due to upwash interaction from the rear rotor wake, leading to noticeable thrust fluctuations in both the front rotor and the overall configuration. These unsteady aerodynamic forces resulted in elevated noise levels. Although this study focused on hovering conditions, further research is planned to investigate rotor interaction effects during forward flight, offering valuable insights for the aerodynamic and acoustic optimization of UAM aircraft.

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