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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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.
|Title:||Unsteady Panel Method Calculation of Pressure Distribution on BO 105 Model Rotor Blades.|
|Journal or Publication Title:||Journal of the American Helicopter Society|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 47-56|
|Keywords:||Panel method, rotor aerodynamics, free wake, blade pressure, BVI|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L - no assignement|
|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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