Imiela, Manfred and Faßmann, Benjamin and Heilers, Gerrit and Wilke, Gunther Andreas (2017) Numerical airfoil catalogue including 360° airfoil polars and aeroacoustic footprints. Wind Energy Science Conference, 26.-29.06.2017, Kopenhagen.
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Abstract
A methodology is presented for generating 360° airfoil polars and aeroacoustic characteristics by means of CFD and CAA. The aerodynamic procedure is validated against experimental data of the well-known airfoils DU-93-W-210 and DU-97-W-300. While a better prediction of the aerodynamic coefficients in the range of -30° and 30° is achieved by a combination of the k-w SST turbulence model and a C-topology mesh, for the remaining angles of attack more confidence is gained with the SA negative turbulence model in combination with an O-topology mesh. Therefore the two data sets are subsequently fused to one complete data set using a kriging interpolation approach. The result of ten different airfoils using the proposed method is presented. For providing the aeroacoustic characteristics for a wide operation range four computations and a bilinear interpolation are needed, since the aeroacoustic is dependent on the Mach and Reynolds number. The bilinear interpolation approach is verificated by a comparison between the originally simulated and the emulated result at a fifth computational set for six different airfoils. The corresponding overall sound pressure level (OASPL) for four angles of attack for these airfoils is presented and the difference between a fully turbulent computation and simulations with fixed transition is assessed. The aeroacoustic results further include high-fidelity directivity functions.
Item URL in elib: | https://elib.dlr.de/117931/ | |||||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | |||||||||||||||
Title: | Numerical airfoil catalogue including 360° airfoil polars and aeroacoustic footprints | |||||||||||||||
Authors: |
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Date: | 27 June 2017 | |||||||||||||||
Refereed publication: | Yes | |||||||||||||||
Open Access: | No | |||||||||||||||
Gold Open Access: | No | |||||||||||||||
In SCOPUS: | No | |||||||||||||||
In ISI Web of Science: | No | |||||||||||||||
Status: | Published | |||||||||||||||
Keywords: | Wind energy, aerodynamic, acoustic, polar, data fusion | |||||||||||||||
Event Title: | Wind Energy Science Conference | |||||||||||||||
Event Location: | Kopenhagen | |||||||||||||||
Event Type: | international Conference | |||||||||||||||
Event Dates: | 26.-29.06.2017 | |||||||||||||||
Organizer: | EAWE | |||||||||||||||
HGF - Research field: | Energy | |||||||||||||||
HGF - Program: | Renewable Energies | |||||||||||||||
HGF - Program Themes: | Wind Energy | |||||||||||||||
DLR - Research area: | Energy | |||||||||||||||
DLR - Program: | E SW - Solar and Wind Energy | |||||||||||||||
DLR - Research theme (Project): | E - Wind Energy (old) | |||||||||||||||
Location: | Braunschweig | |||||||||||||||
Institutes and Institutions: | Institute for Aerodynamics and Flow Technology > Helicopter, BS | |||||||||||||||
Deposited By: | Imiela, Manfred | |||||||||||||||
Deposited On: | 09 Mar 2018 09:33 | |||||||||||||||
Last Modified: | 12 Mar 2018 09:49 |
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