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Chimera Simulations of Multibladed Rotors in High-Speed Forward Flight with Weak Fluid-Structure-Coupling

Pahlke, K. and van der Wall, Berend G. (2005) Chimera Simulations of Multibladed Rotors in High-Speed Forward Flight with Weak Fluid-Structure-Coupling. Aerospace Science and Technology, 9 (5), pp. 379-389.

Full text not available from this repository.

Abstract

The state of the art of weak fluid-structure coupling for rotors in forward flight at DLR is presented. The coupling procedure is based on the DLR rotor simulation code S4 and the DLR Navier-Stokes solver for structured grids FLOWer. The method allows to produce trimmed CFD solutions for rotors in high-speed forward flight with inclusion of elastic blade deformations and viscous effects. The weak coupling procedure is applied to high-speed forward flight test cases of isolated rotors. 4-bladed rotors are simulated for two cases (7A and 7AD rotor) using the chimera approach. A variation of turbulence models from algebraic to 2 equation models did not show significant differences for these high-speed forward flight test cases with moderate rotor loading. The weak coupling which includes the transfer of normal forces, tangential forces and pitching moments from the CFD code to the rotor simulation code improved the overall agreement with the existing experimental data compared to the uncoupled computations considerably. The performance difference between the 7A and the 7AD rotor in high-speed forward flight is well predicted.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=2005,
Title:Chimera Simulations of Multibladed Rotors in High-Speed Forward Flight with Weak Fluid-Structure-Coupling
Authors:
AuthorsInstitution or Email of Authors
Pahlke, K.UNSPECIFIED
van der Wall, Berend G.UNSPECIFIED
Date:2005
Journal or Publication Title:Aerospace Science and Technology
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:9
Page Range:pp. 379-389
Status:Published
Keywords:CFD, RANS, helicopter, time-accurate flows, isolated rotor, forward flight, structured grid, fluid-structure coupling, trim
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 Virtual Aerodynamic Rotorcraft
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Institute of Flight Systems
Deposited By: Claudia Grant
Deposited On:09 Oct 2005
Last Modified:14 Jan 2010 12:49

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