Calculation and Comparison of Aerodynamic Coefficients of a 4-Bladed Tilt Rotor at Cruise and Hover Design Points (EUROFAR).
Lohmann, D. (1990) Calculation and Comparison of Aerodynamic Coefficients of a 4-Bladed Tilt Rotor at Cruise and Hover Design Points (EUROFAR). DLR-Interner Bericht. 129-90/02, 68 S.
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The numerical investigations have been made to compare results of the Lifting Body Surface-Method (LBS-Method) with those of other methods. The results were presented on the EUROFAR Rotor Aerodynamics Meeting at MBB, Ottobrunn, 6 December 1989. Basic equation of the LBS-Method is a linearized integro-diffential equation well known a Ffowcs Williams/Hawkings equation. The solution is obtained by a velocity and an acceleration potential. The LBS-Method was developed for wings, propellers and rotors in subsonic flow. In order to include viscous effects a transpiration model can be used. However, here experimental 2-D airfoil characteristics are considered. It is shown that a modification of the LBS-Code is necessary for the efficiency that has to be replaced by the "Figure of Merit".Computed and compared are aerodynamic coefficients of a 4-bladed rotor at cruise and hover design points.
|Document Type:||Monograph (DLR-Interner Bericht)|
|Additional Information:||LIDO-Berichtsjahr=1990, note=LSEG; 200,|
|Title:||Calculation and Comparison of Aerodynamic Coefficients of a 4-Bladed Tilt Rotor at Cruise and Hover Design Points (EUROFAR).|
|Number of Pages:||68|
|Keywords:||Rotor-Aerodynamics, Acceleration Potential, Lifting Surface Method, T ilt Rotor|
|HGF - Research field:||UNSPECIFIED|
|HGF - Program:||no assignment|
|HGF - Program Themes:||no assignment|
|DLR - Research area:||UNSPECIFIED|
|DLR - Program:||no assignment|
|DLR - Research theme (Project):||L - The Innovative 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 10:04|
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