NDLI: Initial investigation of the acoustics of a counter-rotating open rotor model with historical baseline blades in a low-speed wind tunnel

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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 tunnel

Content Provider	NASA Technical Reports Server (NTRS)
Author	Elliott, David M.
Copyright Year	2012
Description	A 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.
File Size	1750324
Page Count	28
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20120005260
Archival Resource Key	ark:/13960/t2z36t46z
Language	English
Publisher Date	2012-03-01
Access Restriction	Open
Subject Keyword	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 Directivity Power Spectra Scale Models Rotor Blades Turbomachinery Wind Tunnel Tests Rotor Aerodynamics Frequency Distribution Low Speed Wind Tunnels Angle of Attack Counter Rotation Pitch Inclination Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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