Perdigão 2017

Homepage for the DLR contribution to the experiment

The experiment

In Europe, wind energy plant operators are forced to search for sites in complex terrain and are increasingly confronted with challenges in convincing local residents of the further expansion of onshore wind energy. One reason is the periodic noise emitted by the wind turbine. A reliable assessment of noise pollution is therefore indispensable for a successful siting of single or multiple turbines. Turbine wake flow in complex terrain is a challenging task and sound propagation depends on topography and the local flow conditions. Hence, DLR research at the Perdigão measurement campaign aimed at measuring the turbine inflow and wake flow with scanning lidars under various meteorological conditions together with a microwave radiometer (MWR) to assess the thermal stratification of the atmosphere. These measurements were accompanied by five fixed and two mobile microphones simultaneously recording sound levels at selected locations in the surrounding of the wind turbine in order to obtain the local distribution and temporal variation of sound immission. The aim is to correlate specific flow dynamics in the complex terrain around the wind energy converter (WEC) on the southwestern ridge with these sound measurements.
More information on top-level goals of the Perdigão campaign and access to the data can be found through the project websites:
perdigao.fe.up.pt
www.eol.ucar.edu/field_projects/perdigao

Overview paper:
Fernando, H., J. Mann, J. Palma, J. Lundquist, R. Barthelmie, M. BeloPereira, W. Brown, F. Chow, T. Gerz, C. Hocut, P. Klein, L. Leo, J. Matos, S. Oncley, S. Pryor, L. Bariteau, T. Bell, N. Bodini, M. Carney, M. Courtney, E. Creegan, R. Dimitrova, S. Gomes, M. Hagen, J. Hyde, S. Kigle, R. Krishnamurthy, J. Lopes, L. Mazzaro, J. Neher, R. Menke, P. Murphy, L. Oswald, S. Otarola-Bustos, A. Pattantyus, C.V. Rodrigues, A. Schady, N. Sirin, S. Spuler, E. Svensson, J. Tomaszewski, D. Turner, L. van Veen, N. Vasiljević, D. Vassallo, S. Voss, N. Wildmann, and Y. Wang, 0: The Perdigão: Peering into Microscale Details of Mountain Winds. Bull. Amer. Meteor. Soc., 0, https://doi.org/10.1175/BAMS-D-17-0227.1

Overview

To give an overview of instrument positions, terrain and wind conditions during the IOP-period from 01 May to 15 June, a map and a table is given here with information about the DLR instrumentation.

Instrument Latitude (deg) Longitude (deg) Altitude (m) Easting (m) Northing (m) HMSL (m)
Wind turbine 39.70758731 -7.74497609 539.455 33285.1 4438.67 483.84
Lidar #1 (DLR85) 39.71453020 -7.73114489 513.823 34467.772 5214.761 458.208
Lidar #2 (DLR86) 39.71245203 -7.73511385 378.802 34128.462 4982.504 323.187
Lidar #3 (DLR89) 39.70986192 -7.74680379 535.783 33127.273 4690.542 480.168
MWR 39.70140137 -7.76387424 278.49 31667.272 3745.005 222.875
Microphone #1 39.7096271 -7.7464972 529 33152 4665 473.385
Microphone #2 39.7064355 -7.7440470 534 33365 4311 478.385
Microphone #3 39.7066221 -7.7553323 293 32396 4328 237.385
Microphone #4 39.7126526 -7.7355525 369 34089 5005 313.385
Microphone #5 39.7111150 -7.7349189 357 34146 4834 301.385

Quicklooks

For all measurement systems and for the WRF simulations quicklooks have been generated which can be accessed through the following links:

Lidar

MWR

Acoustic

WRF
Institut für Physik der Atmosphäre
DLR Oberpfaffenhofen
Germany
Kontakt: norman.wildmann ät dlr.de




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