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Design of a Rotor Blade Tip for the Investigation of Dynamic Stall in the Transonic Wind Tunnel Göttingen

Lütke, Benjamin and Neumann, Jens and Schmidt, Moritz (2014) Design of a Rotor Blade Tip for the Investigation of Dynamic Stall in the Transonic Wind Tunnel Göttingen. In: 40th European Rotorcraft Forum 2014. ERF 2014 - 40th European Rotorcraft Forum, 02.-05. Sept. 2014, Southampton.

Full text not available from this repository.

Abstract

The design of a pitching blade tip wind tunnel model with a double swept planform is presented. The geometry of the model and the experimental setup for the investigation of dynamic stall are shown. Steady and unsteady RANS calculations are performed to study the expected flow phenomena and identify the relevant loads at Ma=0.4 and Re=1.2-1.610^6. First unsteady dynamic stall cases reveal no significant aerodynamic pitching moments. Design features of the highly loaded carbon fiber structure are presented. Different finite element (FE) modeling approaches for the carbon composite shells bonded to a steel shaft and a spar are described in detail. Eigenfrequencies, deformation and stress distribution are evaluated. Steady coupled simulations with different spar cap orientations reveal a slightly higher negative elastic twist for forward orientated carbon fibers.

Item URL in elib:https://elib.dlr.de/94554/
Document Type:Conference or Workshop Item (Speech)
Title:Design of a Rotor Blade Tip for the Investigation of Dynamic Stall in the Transonic Wind Tunnel Göttingen
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lütke, Benjaminbenjamin.luetke (at) dlr.deUNSPECIFIED
Neumann, Jensjens.neumann (at) dlr.deUNSPECIFIED
Schmidt, Moritzmoritz.schmidt (at) dlr.deUNSPECIFIED
Date:September 2014
Journal or Publication Title:40th European Rotorcraft Forum 2014
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:dynamic Stall, double swept, helicopter, rotor blade tip
Event Title:ERF 2014 - 40th European Rotorcraft Forum
Event Location:Southampton
Event Type:international Conference
Event Dates:02.-05. Sept. 2014
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: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Lütke, Benjamin
Deposited On:13 Jan 2015 10:12
Last Modified:10 Mar 2015 09:41

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