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Fuselage-Induced Velocity Model for LRTA, RTA, and HART Fuselages

van der Wall, Berend G. and Jung, Sung N. and Rajagopalan, Ganesh and Solis, Eduardo and Castro, Angello (2015) Fuselage-Induced Velocity Model for LRTA, RTA, and HART Fuselages. Other. NASA/CR-2015-218840, 79 S.

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In order to make the aerodynamic fuselage-rotor interference effects available to comprehensive rotor codes, a simple analytical model of the fuselage-induced velocities is developed here for the following bodies used in wind tunnel experiments: • the Large Rotor Test Apparatus (LRTA), • the Rotor Test Apparatus (RTA), and • the Higher Harmonic Control Aeroacoustic Rotor Test (HART). While the first two are used in the National Full-Scale Aerodynamics Complex (NFAC) at NASA Ames Research Center, California; the third one is used by DLR in the large low-speed facility of the German-Dutch wind tunnel in the Netherlands. The fuselage-induced velocity model is based on parameter identification of isolated fuselage-induced velocity data (computed by means of computational fluid dynamics, CFD) and is intended to be generic enough to be used for real helicopter fuselages as well. The accuracies obtained in reproducing the CFD data show a remaining average error of less than or equal to 5% of the peak-to-peak induced velocity range; which is considered sufficient for comprehensive code analysis.

Item URL in elib:https://elib.dlr.de/95987/
Document Type:Monograph (Other)
Title:Fuselage-Induced Velocity Model for LRTA, RTA, and HART Fuselages
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
van der Wall, Berend G.Berend.vanderWall (at) dlr.deUNSPECIFIED
Jung, Sung N.Konkuk UniversityUNSPECIFIED
Rajagopalan, GaneshSukra-HelitekUNSPECIFIED
Castro, AngelloUniv. Space Res. Ass., NASA AmesUNSPECIFIED
Date:June 2015
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Number of Pages:79
Keywords:fuselage aerodynamics, fuselage-rotor interference, helicopter aeromechanics, comprehensive rotor code, semi-empirical modeling
Institution:National Aeronautics and Space Administration
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Innovative Rotorcraft (old)
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Rotorcraft
Deposited By: van der Wall, Prof. Dr. Berend G.
Deposited On:08 Jul 2015 11:24
Last Modified:08 Jul 2015 11:24

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