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Unsteady Panel Method Calculation of Pressure Distribution on BO 105 Model Rotor Blades.

Ahmed, S.R. and Vidjaja, V.T. (1998) Unsteady Panel Method Calculation of Pressure Distribution on BO 105 Model Rotor Blades. Journal of the American Helicopter Society, 43 (1), pp. 47-56.

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Abstract

An unsteady 3-D Panel method has been developed to compute the subsonic aerodynamics of finite thickness multi-bladed rotors. The full span free wake of the blades is simulated by a lattice of shed and trailing vortices. The method is applied to a two-bladed and the four-bladed BO 105 hingeless rotor in hover. The four-bladed rotor has also been studied in the forward flight descent and climb modes. Prediction of pressure distribution on blade surface during hover agrees very well with wind tunnel test data and Euler solver results. Results for descent flight where severe blade vortex interaction (BVI) takes place in fair agreement with the experiment. Also results for the climb mode correlate well with test data. The time-stepping scheme employed permits a detailed study of the wake development. This is done for the descent case to indicate areas of possible severe BVI.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=1998,
Title:Unsteady Panel Method Calculation of Pressure Distribution on BO 105 Model Rotor Blades.
Authors:
AuthorsInstitution or Email of Authors
Ahmed, S.R.UNSPECIFIED
Vidjaja, V.T.UNSPECIFIED
Date:1998
Journal or Publication Title:Journal of the American Helicopter Society
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:43
Page Range:pp. 47-56
Status:Published
Keywords:Panel method, rotor aerodynamics, free wake, blade pressure, BVI
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
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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