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An Overview of the Proprotor Performance Test in the 14- by 22-Foot Subsonic Tunnel

Nikolas Zawodny, Kyle Pascioni, Christopher Thurman, NASA Langley Research Center

https://doi.org/10.4050/F-0079-2023-18054

Abstract:
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 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

  • Presented at Forum 79
  • 14 pages
  • SKU # : F-0079-2023-18054
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An Overview of the Proprotor Performance Test in the 14- by 22-Foot Subsonic Tunnel

Authors / Details:
Nikolas Zawodny, Kyle Pascioni, Christopher Thurman, NASA Langley Research Center