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Acoustic Testing of the Tiltrotor Test Rig in the National Full-Scale Aerodynamics Complex 40- by 80-Foot Wind TunnelThe Tiltrotor Test Rig (TTR) was tested in the National Full-Scale Aerodynamics Complex (NFAC) 40- by 80-Foot Wind Tunnel from 2017 to 2018. The primary goal of the test was to understand the operational capabilities of the TTR, while also acquiring research data, including acoustic data. Four microphones were placed around the TTR: two on the wind tunnel floor and two on struts. Acoustic measurements of the TTR rotor were acquired to 1) understand the acoustic testing capabilities of the TTR in the NFAC 40- by 80-FootWind Tunnel, 2) compare to previous XV-15 rotor acoustic data acquired in the NFAC 80- by 120-Foot Wind Tunnel, and 3) provide data for future validation studies. A data quality study revealed that the NFAC 40- by 80-Foot Wind Tunnel is an adequate acoustic environment to test the TTR rotor. For a given thrust and advance ratio, a shaft angle sweep was performed and acoustic measurements were compared against 1996 and 1999 XV-15 data in the NFAC 80- by 120-Foot Wind Tunnel; differences between the three tests are discussed.
Document ID
20190025116
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Schatzman, Natasha L.
(NASA Ames Research Center Moffett Field, CA, United States)
Malpica, Carlos
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
May 15, 2019
Publication Date
May 13, 2019
Subject Category
Aerodynamics
Acoustics
Report/Patent Number
ARC-E-DAA-TN67821
Meeting Information
Meeting: Annual Forum & Technology Display
Location: Philadelphia, PA
Country: United States
Start Date: May 13, 2019
End Date: May 16, 2019
Sponsors: Vertical Flight Society
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
40- by 80-FootWind Tunnel
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