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Helicopter Rotor Loads Prediction and Validation Based on a Fully Nonlinear Aeroelastic Method

Surrey, Stefan (2017) Helicopter Rotor Loads Prediction and Validation Based on a Fully Nonlinear Aeroelastic Method. DLR-Forschungsbericht. DLR-FB-2017-12. Dissertation. Technische Universität Braunschweig. 158 S.

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State-of-the-art helicopter rotor simulations reveal that the prediction accuracy of aerodynamic and structural main rotor loads is still insufficient. In particular, deficits are apparent in simulations of flight conditions on the edge of the flight envelope -such as high-thrust forward flight with three dimensional flow separation on the retreating blade. This work presents numerical approaches for the improved prediction of helicopter rotor loads. Using high-fidelity validated CFD-MBS methods have been enhanced the accuracy of aeroelastic simulations compared to state-of-the-art. The research contains the analysis of the structural blade dynamics isolated from the aeroelastic helicopter response problem. Investigations of the aeroelastic rotor behavior are based on tightly-coupled simulations between an unstructured CFD solver and a Multibody Software (MBS) using the previously validated structural rotor blade models. The rotor predictions were assessed with aerodynamical and structural data gained from European wind tunnel measurements.

Item URL in elib:https://elib.dlr.de/112496/
Document Type:Monograph (DLR-Forschungsbericht, Dissertation)
Title:Helicopter Rotor Loads Prediction and Validation Based on a Fully Nonlinear Aeroelastic Method
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Refereed publication:Yes
Open Access:No
Number of Pages:158
Keywords:aeroelasticity, helicopter rotor simulation, tight CFD-MBS coupling, dynamic stall, multibody dynamics, structural blade modelling
Institution:Technische Universität Braunschweig
Department:Fakultät Maschinenbau
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 (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulation
Deposited By: Surrey, Stefan
Deposited On:06 Jun 2017 09:09
Last Modified:06 Jun 2017 09:09

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