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Initial Investigation of the Acoustics of a Counter-Rotating Open Rotor Model with Historical Baseline Blades in a Low-Speed Wind TunnelA counter-rotating open rotor scale model was tested in the NASA Glenn Research Center 9- by 15-Foot Low-Speed Wind Tunnel (LSWT). This model used a historical baseline blade set with which modern blade designs will be compared against on an acoustic and aerodynamic performance basis. Different blade pitch angles simulating approach and takeoff conditions were tested, along with angle-of-attack configurations. A configuration was also tested in order to determine the acoustic effects of a pylon. The shaft speed was varied for each configuration in order to get data over a range of operability. The freestream Mach number was also varied for some configurations. Sideline acoustic data were taken for each of these test configurations.
Document ID
20120005260
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
David M Elliott
(Glenn Research Center Cleveland, Ohio, United States)
Date Acquired
August 25, 2013
Publication Date
March 1, 2012
Publication Information
Publication: 17th AIAA/CEAS Aeroacoustics Conference (32nd AIAA Aeroacoustics Conference)
Publisher: American Institute of Aeronautics and Astronautics
e-ISBN: 9781600869433
Subject Category
Acoustics
Report/Patent Number
NASA/TM-2012-217258
E-18013
AIAA-2011-2760
Meeting Information
Meeting: 17th AIAA/CEAS Aeroacoustics Conference (32nd AIAA Aeroacoustics Conference)
Location: Portland, OR
Country: US
Start Date: June 5, 2011
End Date: June 8, 2011
Sponsors: Council of European Aerospace Societies, American Institute of Aeronautics and Astronautics
Funding Number(s)
WBS: 699959.02.09.03.05
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
Acoustics
Counter rotating
Open rotor blades
Baseline blades
Low speed wind tunnel
Acoustic measurement
Aerodynamic performance
Freestream Mach Number
Blade pitch
NASA Glenn Research Center
Overall sound pressure level
Rotor blades
Aviation
Particle image velocimetry
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