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Nearfield Unsteady Pressures at Cruise Mach Numbers for a Model Scale Counter-Rotation Open RotorAn open rotor experiment was conducted at cruise Mach numbers and the unsteady pressure in the nearfield was measured. The system included extensive performance measurements, which can help provide insight into the noise generating mechanisms in the absence of flow measurements. A set of data acquired at a constant blade pitch angle but various rotor speeds was examined. The tone levels generated by the front and rear rotor were found to be nearly equal when the thrust was evenly balanced between rotors.
Document ID
20120018029
Acquisition Source
Glenn Research Center
Document Type
Presentation
Authors
Stephens, David B. (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 25, 2013
Publication Date
June 4, 2012
Subject Category
Aerodynamics
Report/Patent Number
E-18347-1
Meeting Information
Meeting: 18th AIAA/CEAS Aeroacoustics Conference
Location: Colorado Spring, CO
Country: United States
Start Date: June 4, 2012
End Date: June 6, 2012
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 699959.02.09.03.05
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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