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Numerical Assessment of the airfoils EDI-M109 and EDI-M112 by 3D CFD calculations of the 5-bladed INROS rotor in Hover and Forward Flight

Raddatz, Jochen (2016) Numerical Assessment of the airfoils EDI-M109 and EDI-M112 by 3D CFD calculations of the 5-bladed INROS rotor in Hover and Forward Flight. DLR-Interner Bericht. DLR-EB-AS-BS-2016-902, 35 S.

Full text not available from this repository.

Abstract

Numerical investigations of a helicopter rotor in hover and forward flight are presented to evaluate the benefit of the new rotor airfoils EDI-M109 and EDI-M112. In order to minimize the impact of numerical uncertainties the results are compared with computations of a reference rotor using rotor blades with the identical planform and twist, but different airfoils of the OA-series. In all cases investigated the power requirements of the rotor with EDI-airfoils are lower than for the reference rotor with OA-airfoils. Comparisons of fully turbulent calculations and calculations including transition prediction indicate that the performance enhancements of the new EDI-airfoils are based only to a lesser extent on the enlargement of the laminar zones. For the hover calculations a RANS method was applied. The forward flight calculations are computed with coupled approach of an URANS method and a comprehensive rotor simulation code in order to trim the rotors to identical flight conditions and to consider the elastic deformations of the blades. For high accurate numerical results the laminar-turbulent transition is considered by empirical criteria and the influence of the laminar areas are investigated by comparisons with fully turbulent computations.

Item URL in elib:https://elib.dlr.de/107407/
Document Type:Monograph (DLR-Interner Bericht)
Additional Information:Ergebnisbericht (IB mit Zugänglichkeitsstufe 2)
Title:Numerical Assessment of the airfoils EDI-M109 and EDI-M112 by 3D CFD calculations of the 5-bladed INROS rotor in Hover and Forward Flight
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Raddatz, JochenJochen.Raddatz (at) dlr.deUNSPECIFIED
Date:May 2016
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:35
Status:Published
Keywords:helicopter, rotor. airfoil, power requirement, numerical simulation, RANS-method, URANS-method, FLOWer, HOST, laminar-turbulent transition
Institution:Deutsches Zentrum für Luft- und Raumfahrt e.V.
Department:Institut für Aerodynamik und Strömungstechnik, Abteilung Hubschrauber
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 Virtual Aerodynamic Rotorcraft
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Raddatz, Jochen
Deposited On:09 Nov 2016 11:25
Last Modified:09 Nov 2016 11:25

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