000212352 001__ 212352
000212352 005__ 20180913063344.0
000212352 0247_ $$2doi$$a10.1088/1742-6596/625/1/012034
000212352 022__ $$a1742-6588
000212352 02470 $$2ISI$$a000358047700034
000212352 037__ $$aCONF
000212352 245__ $$aInstability of wind turbine wakes immersed in the atmospheric boundary layer
000212352 260__ $$aBristol$$bIop Publishing Ltd$$c2015
000212352 269__ $$a2015
000212352 300__ $$a9
000212352 336__ $$aConference Papers
000212352 490__ $$aJournal of Physics Conference Series
000212352 520__ $$aIn this work a technique capable to investigate the near-wake stability properties of a wind turbine immersed in the atmospheric boundary layer is presented. Specifically, a 2D local spatial stability analysis is developed in order to take into account typical flow features of real operating wind turbines, such as the presence of the atmospheric boundary layer and the turbulence heterogeneity of the oncoming wind. This stability analysis can be generally applied on either experimental measurements or numerical data. In this paper it was carried out on wind tunnel experiments, for which a downscaled wind turbine is immersed in a turbulent boundary layer. Through spatial stability analysis, the dominant mode in the near wake, i.e. the most amplified one, is characterized and its frequency matches the hub-vortex instability frequency measured in the wind tunnel. As in the case of [10], where an axisymmetric wake condition was investigated, the hub-vortex instability results in a single-helical mode.
000212352 700__ $$0246499$$aViola, Francesco$$g218759$$uEcole Polytech Fed Lausanne, Lab Fluid Mech & Instabilities, Lausanne, Switzerland
000212352 700__ $$0244156$$aIungo, Giacomo Valerio$$g206364$$uUniv Texas Dallas, Dept Mech Engn, Wind Fluids & Expt Lab WindFluX, Richardson, TX 75080 USA
000212352 700__ $$aCamarri, Simone$$uUniv Pisa, Dept Civil & Ind Engn, I-56122 Pisa, Italy
000212352 700__ $$0243661$$aPorte-Agel, Fernando$$g168244
000212352 700__ $$0244721$$aGallaire, Francois$$g189938$$uEcole Polytech Fed Lausanne, Lab Fluid Mech & Instabilities, Lausanne, Switzerland
000212352 7112_ $$aWake Conference 2015
000212352 720_1 $$aMasson, C$$eed.
000212352 720_1 $$0243661$$aPorteangel, F$$eed.$$g168244
000212352 720_1 $$aLeweke, T$$eed.
000212352 720_1 $$aSchepers, G$$eed.
000212352 720_1 $$aVankuik, G$$eed.
000212352 720_1 $$aLarsen, G$$eed.
000212352 720_1 $$aMann, J$$eed.
000212352 720_1 $$aRodrigo, Js$$eed.
000212352 720_1 $$aMeyers, J$$eed.
000212352 720_1 $$aBarthelmie, R$$eed.
000212352 720_1 $$aAubrunsanches, S$$eed.
000212352 773__ $$j625$$q012034$$tWake Conference 2015
000212352 909C0 $$0252260$$pWIRE$$xU12172
000212352 909C0 $$0252358$$pLFMI$$xU12052
000212352 909CO $$ooai:infoscience.tind.io:212352$$pconf$$pSTI$$pENAC
000212352 917Z8 $$x168244
000212352 937__ $$aEPFL-CONF-212352
000212352 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000212352 980__ $$aCONF