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Main/Tail Rotor Interaction under Ground Effect Using DLR 3D Free Wake Code

Yin, J. and Delfs, J. (2003) Main/Tail Rotor Interaction under Ground Effect Using DLR 3D Free Wake Code. 29th European Rotorcraft Forum, Friedrichshafen (de), 16.-18.09.2003.

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Abstract

The prediction of the ground effect on rotor aerodynamics remains a challenging task for all wake models because of the complicated influence of the ground on the wake development. A numerical simulation of main rotor and tail rotor interaction operating in ground effect was carried out with two different ground models, an image and a surface singularity model. An unsteady free wake 3-D panel code developed at DLR has been extended to account for the ground effect. The effect of the ground on rotor interference versus height above ground was examined on the basis of the main and tail rotor wake development and corresponding loads. The study was conducted for a simultaneously rotated main/tail rotor configuration in hover and forward flight. The results with two different ground models were compared. The problem of using a surface singularity model is discussed.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2005,
Title:Main/Tail Rotor Interaction under Ground Effect Using DLR 3D Free Wake Code
Authors:
AuthorsInstitution or Email of Authors
Yin, J.UNSPECIFIED
Delfs, J.UNSPECIFIED
Date:2003
Status:Published
Keywords:3D-Free wake, Panel Method, main rotor (MR) and tail rotor (TR) mutual interaction, Ground effect
Event Title:29th European Rotorcraft Forum, Friedrichshafen (de), 16.-18.09.2003
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Quiet and Comfortable Rotorcraft
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Claudia Grant
Deposited On:31 Jan 2006
Last Modified:14 Jan 2010 19:53

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