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Prediction of Blade Vortex Interaction Aerodynamics for a Higher Harmonic Controlled Rotor

Ahmed, S.R. (1996) Prediction of Blade Vortex Interaction Aerodynamics for a Higher Harmonic Controlled Rotor. 2 nd AIAA/CEAS Aeroacoustics Conference, State College, USA, 06.-08.05.96, Paper No. AIAA 96-1698.

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Abstract

An unsteady 3-D Panel Method is applied to compute the subsonic aerodynamics of a four blade rotor operating under Higher Harmonic Controlled (HHC) pitch input. The blades are of finite thickness and the full span free wake is simulated by a vortex lattice which evolves as the computation proceeds. Three flight conditions: Baseline, without HHC input, Minimum Noise and Minimum Vibration with 3-per-rev. HHC inputs are the subject of study. Predicted pressure distribution, chordwise and spanwise for all three cases is in fair agreement with wind tunnel results. Time history of pressure at selected chordwise and spanwise stations captures the basic trends of the experimental results. Blade Vortex Interaction Loci in rotor disc and tip vortex trajectories predicted are in good agreement with results obtained at ONERA and experiment. The shift of tip vortex trajectory with.

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=1996, pages=16,
Title:Prediction of Blade Vortex Interaction Aerodynamics for a Higher Harmonic Controlled Rotor
Authors:
AuthorsInstitution or Email of Authors
Ahmed, S.R.UNSPECIFIED
Date:1996
Series Name:AIAA 96-1698
Status:Published
Keywords:Rotoraerodynamics, BVI, HHC
Event Title:2 nd AIAA/CEAS Aeroacoustics Conference, State College, USA, 06.-08.05.96, Paper No. AIAA 96-1698
HGF - Research field:UNSPECIFIED
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:L DT - Drehflüglertechnologien
DLR - Research theme (Project):L - The Quiet and Comfortable Rotorcraft
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Entwurfsaerodynamik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:06

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