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Berechnung der Umströmung von Mehrblattrotoren im schnellen Vorwärtsflug mit einer schwachen Fluid-Struktur-Kopplung

Pahlke, K. and van der Wall, Berend G. (2002) Berechnung der Umströmung von Mehrblattrotoren im schnellen Vorwärtsflug mit einer schwachen Fluid-Struktur-Kopplung. Other. ISBN-Nr. 3-18-091682-6, 20 S.

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Abstract

A weak coupling procedure for coupling the DLR rotor simulation code S4 and the DLR Euler/Navier-Stokes solver FLOWer is presented. 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 the 7A and the 7AD rotor. Isolated blade computations are carried out for both rotors while the full 4-bladed rotor is simulated only in the 7A case using the chimera approach. The predicted pitching moment computed with the assumption of inviscid flow (Euler solutions) shows large differences compared to the experimental data while viscous (Navier-Stokes) computations are in much better agreement with the measured data. The weak coupling considerably improved the solution compared to the uncoupled CFD computations. The performance difference between the 7A and 7AD rotor in high-speed forward flight was fairly well predicted.

Document Type:Monograph (Other)
Additional Information: LIDO-Berichtsjahr=2003,
Title:Berechnung der Umströmung von Mehrblattrotoren im schnellen Vorwärtsflug mit einer schwachen Fluid-Struktur-Kopplung
Authors:
AuthorsInstitution or Email of Authors
Pahlke, K.UNSPECIFIED
van der Wall, Berend G.Institut für Flugsystemtechnik
Date:2002
Number of Pages:20
Series Name:VDI-Berichte 1682, Fluid-Struktur-Wechselwirkung
Status:Published
Keywords:Isolated rotor, forward flight, elastic blades, fluid-structure coupling, viscous flows, Navier-Stokes equations
Institution:VDI
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: elib DLR-Beauftragter
Deposited On:31 Jan 2006
Last Modified:14 Jan 2010 19:05

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