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Enhancement of Prescribed Wake Codes with a CFD-Based Model of the Fuselage-Induced Velocities

van der Wall, Berend G. and Bauknecht, Andre and Jung, Sung N. and You, Young H. (2013) Enhancement of Prescribed Wake Codes with a CFD-Based Model of the Fuselage-Induced Velocities. 39th European Rotorcraft Forum, 03.-06. Sept. 2013, Moscow, Russia.

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An analytical formulation of the induced velocities caused by the fuselage shell of the HART II wind tunnel model in the vicinity of the rotor is derived from computational fluid dynamics (CFD) velocity data. The analytical induced velocity model can directly be used to account for the inflow at the blade elements and also allows for analytical integration to compute the associated displacements of rotor blade tip vortices convecting downstream through this velocity field. The implementation is demonstrated at the example of the rotor simulation program S4 of the German Aerospace Center (DLR) in Braunschweig. The model’s influence on the major flow field variables around the rotor disk and the wake trajectory is demonstrated. Since the method is generic it is anticipated that the effect of any kind of fuselage can be accounted for this way and it may be used within any comprehensive code, prescribed wake code, and even free-wake codes.

Document Type:Conference or Workshop Item (Speech)
Title:Enhancement of Prescribed Wake Codes with a CFD-Based Model of the Fuselage-Induced Velocities
AuthorsInstitution or Email of Authors
van der Wall, Berend G.Berend.vanderWall@dlr.de
Bauknecht, Andreandre.bauknecht@dlr.de
Jung, Sung N.Konkuk University
You, Young H.Konkuk University
Date:September 2013
Refereed publication:No
Page Range:pp. 1-14
Keywords:Rotor-fuselage interference, interactional aerodynamics, fuselage flow, rotor simulation
Event Title:39th European Rotorcraft Forum
Event Location:Moscow, Russia
Event Type:international Conference
Event Dates:03.-06. Sept. 2013
Organizer:Russian Helicopters, Moscow
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Innovative Rotorcraft
Location: Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Institute of Flight Systems > Rotorcraft
Deposited By: Dr.-Ing. Berend G. van der Wall
Deposited On:09 Sep 2013 15:14
Last Modified:27 Nov 2013 15:58

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