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Small Propeller and Rotor Testing Capabilities of the NASA Langley Low Speed Aeroacoustic Wind TunnelThe Low Speed Aeroacoustic Wind Tunnel (LSAWT) at NASA Langley Research Center has recently undergone a configuration change. This change incorporates an inlet nozzle extension meant to serve the dual purposes of achieving lower free-stream velocities as well as a larger core flow region. The LSAWT, part of the NASA Langley Jet Noise Laboratory, had historically been utilized to simulate realistic forward flight conditions of commercial and military aircraft engines in an anechoic environment. The facility was modified starting in 2016 in order to expand its capabilities for the aerodynamic and acoustic testing of small propeller and unmanned aircraft system (UAS) rotor configurations. This paper describes the modifications made to the facility, its current aerodynamic and acoustic capabilities, the propeller and UAS rotor-vehicle configurations to be tested, and some preliminary predictions and experimental data for isolated propeller and UAS rotor con figurations, respectively. Isolated propeller simulations have been performed spanning a range of advance ratios to identify the theoretical propeller operational limits of the LSAWT. Performance and acoustic measurements of an isolated UAS rotor in hover conditions are found to compare favorably with previously measured data in an anechoic chamber and blade element-based acoustic predictions.
Document ID
20170005862
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Zawodny, Nikolas S. (NASA Langley Research Center Hampton, VA, United States)
Haskin, Henry H. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
June 28, 2017
Publication Date
June 5, 2017
Subject Category
Acoustics
Aerodynamics
Report/Patent Number
NF1676L-25691
Meeting Information
Meeting: AIAA Aviation 2017
Location: Denver, CO
Country: United States
Start Date: June 5, 2017
End Date: June 9, 2017
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 109492.02.07.01.10
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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