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Correlation of Smart Active Flap Rotor LoadsThe ability to predict SMART active trailing edge flap rotor loads is explored in this study. Full-scale wind tunnel data recently acquired in the NASA Ames 40- by 80- Foot Wind Tunnel are compared with analytical results from CAMRAD II. For the 5-bladed rotor, two high-speed forward flight cases are considered, namely, a 0 deg flap deflection case and a 5P, 2 deg flap deflection case. Overall, the correlation is reasonable, with the following exceptions: the torsion moment frequency and the chordwise bending moment are under predicted. In general, the effect of the 5P, 2 deg flap motion is captured by the analysis, though there is over prediction in the neighborhood of the 105 deg and 120 deg azimuthal locations. Changes to the flexbeam torsion stiffness are also briefly considered in this study, as this stiffness will be updated in the future. Finally, the indication is that compressibility effects are important, and this suggests that computational fluid dynamics might improve the current correlation.
Document ID
20090035869
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Kottapalli, Sesi
(NASA Ames Research Center Moffett Field, CA, United States)
Straub, Friedrich
(Boeing Co. Mesa, AZ, United States)
Date Acquired
August 24, 2013
Publication Date
May 27, 2009
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
748
ARC-E-DAA-TN463
Meeting Information
Meeting: American Helicopter Society 65th Annual Forum and Technology Display
Location: Grapevine, TX
Country: United States
Start Date: May 27, 2009
End Date: May 29, 2009
Sponsors: American Helicopter Society, Inc.
Distribution Limits
Public
Copyright
Other

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