Preprints
https://doi.org/10.5194/wes-2017-51
https://doi.org/10.5194/wes-2017-51
22 Nov 2017
 | 22 Nov 2017
Status: this preprint was under review for the journal WES but the revision was not accepted.

Numerical airfoil catalogue including 360° airfoil polars and aeroacoustic footprints

Manfred Imiela, Benjamin Faßmann, Gerrit Heilers, and Gunther Wilke

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-ω 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.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
Manfred Imiela, Benjamin Faßmann, Gerrit Heilers, and Gunther Wilke
 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Manfred Imiela, Benjamin Faßmann, Gerrit Heilers, and Gunther Wilke
Manfred Imiela, Benjamin Faßmann, Gerrit Heilers, and Gunther Wilke

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