This work experimentally investigates the aerodynamic behavior of proprotors across a wide range of angles of attack. These flight conditions are intended to be representative of Urban Air Mobility (UAM) vehicle platforms that utilize articulating propulsors to transition from a vertical takeoff and landing (VTOL) phase typical of a conventional rotorcraft, to an axial mode of forward flight typical of a fixed-wing aircraft. These data are used to identify the potential limits of lower fidelity aerodynamic modeling tools, as well as to inform future acoustic phases of testing. Tests were conducted on two proprotor designs in the NASA Langley 14- by 22-Foot Subsonic Tunnel using an articulating propeller test stand. Hover results identified unique flow physics on one of the proprotors, including severe outboard flow separation and perpendicular blade vortex interactions on the outboard portions of the blades. Transition and forward flight conditions yielded very informative trends in terms of both on- and off-axis forces and moments against which low-fidelity prediction models were compared.
An Overview of the Proprotor Performance Test in the 14- by 22-Foot Subsonic Tunnel
The Vertical Flight Society’s 79th Annual Forum & Technology Display ; 2023 ; West Palm Beach, FL, US
Aufsatz (Konferenz)
Keine Angabe
Englisch
An Overview of the Proprotor Performance Test in the 14- by 22-Foot Subsonic Tunnel
British Library Conference Proceedings | 2023
|