Performance, Vibration, and BVI Noise Analyses of eVTOL Tiltrotor With Sweepback Angles

Key Points

• The study aims to examine the effects of applying a 20° sweepback angle on an eVTOL tiltrotor's performance and noise characteristics.
• Utilized CAMRAD II and CII-Sound for aeromechanical and noise analyses.
• Compared a base model with no sweepback angle to a model with a 20° sweepback.
• Assessed aerodynamic performance, rotor hub vibration, and BVI noise levels.
• Propeller efficiency increased by up to 16.9% and stationary flight performance by 11.9% with the sweepback angle.
• Rotor hub vibration decreased by 36.6% and increased by 18.5% at specific angles during low-speed flight.
• Maximum BVI noise reduced by 1.9 dB at a rotor angle of 6° when the sweepback angle was applied.