TY - GEN
T1 - Acoustics of a Rotary Wing with Passive Reduced Tip Vortex in a Static Configuration
AU - Diaz, Mateo
AU - Yu, Daniel
AU - Ansell, Phillip
AU - Saxton-Fox, Theresa
N1 - This work was sponsored by Air Force Research Laboratory (AFRL), funded by AFWERX Agility Prime Phase I STTR contract # FA8649-21-P0053. The authors wish to thank Joseph Zimmerman and David Carroll of CU Aerospace for their contributions to this work. The authors also extend their appreciation to Professor Jennifer Bernhard for the use of the anechoic chamber in her laboratory.
PY - 2023
Y1 - 2023
N2 - Acoustics data collection was performed in an anechoic chamber for two propeller blade types, one a power optimized blade and one a novel blade designed to reduce generated tip vortex strength. Both blade types had a 7.82” radius, a 2.25” root chord, a taper ratio of 2, a thrust coefficient of 0.003, and used an Eppler E387 airfoil. The blades were held at a steady 5000 rotations per minute as data were captured at 11 different microphone locations downwind of the rotor disc. Data were processed using a Fourier transform and analyzed. Key peaks in the processed data were identified and compared for each blade type and microphone location. Compared to the power optimized blade, the wake-optimized blade was found to have a greater number of distinct peaks. Additionally, for peaks that were present in the acoustic signatures of both blade types, the wake-optimized blade’s peaks were slightly greater in magnitude on average.
AB - Acoustics data collection was performed in an anechoic chamber for two propeller blade types, one a power optimized blade and one a novel blade designed to reduce generated tip vortex strength. Both blade types had a 7.82” radius, a 2.25” root chord, a taper ratio of 2, a thrust coefficient of 0.003, and used an Eppler E387 airfoil. The blades were held at a steady 5000 rotations per minute as data were captured at 11 different microphone locations downwind of the rotor disc. Data were processed using a Fourier transform and analyzed. Key peaks in the processed data were identified and compared for each blade type and microphone location. Compared to the power optimized blade, the wake-optimized blade was found to have a greater number of distinct peaks. Additionally, for peaks that were present in the acoustic signatures of both blade types, the wake-optimized blade’s peaks were slightly greater in magnitude on average.
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U2 - 10.2514/6.2023-0620
DO - 10.2514/6.2023-0620
M3 - Conference contribution
AN - SCOPUS:85198664149
SN - 9781624106996
T3 - AIAA SciTech Forum and Exposition, 2023
BT - AIAA SciTech Forum and Exposition, 2023
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA SciTech Forum and Exposition, 2023
Y2 - 23 January 2023 through 27 January 2023
ER -