Particle Image Velocimetry (PIV) measurements of vortex generators (VG) on a flat plate with zero- and adverse-pressure gradients. Time-averaged velocity fields with turbulence statistics have been acquired in transverse planes in the wake of rectangular, vane-type vortex generators up to 50 device heights downstream the VG trailing edges.
The wind tunnel test has been performed at the HDG wind tunnel, which is a closed return circuit with a closed test section of 0.6 x 0.6 m. (width x height) and 1 m. length, and a contraction ratio of 5.85. This tunnel can be pressurized up to 100 bars to achieve high Reynolds numbers. The wind tunnel speed is controlled by rpm regulation of the constant pitch fan in the range from 3.5 to 35 m/s, which allows for Reynolds number effect simulations with negligible Mach influence as it stays always below 0.1.
The test section used for the measurements is a dedicated 2D test section where the model is horizontally installed in the mid part into a remote controlled alpha mechanism capable of performing 360º of angular setting of the model. Top and bottom wall centerlines are equipped with 23 pressure taps each, equally distributed over the whole length of the test section, which can be used to calculate wall interference properties
A 2MW, 66m V66 VESTAS wind turbine located near Blyth UK, 1⁄2 km from the British East coast, was instrumented for measuring bending moments at four levels between mean sea level and mudline on the mono-pile.
The ECN Wind Turbine Test Station Wieringermeer (EWTW) is a test location for wind turbines that comprises of six prototype turbines, five research N80 turbines and five large meteorological masts.
ECN Wind Turbine Test Site Wieringermeer
All experiments were carried out at the small test section (1.4mx1.8m) of the National Technical University of Athens (NTUA) wind tunnel [1]. The wind tunnel is of the closed single-return type with a total circuit length of 68.81 m. The circuit has a contraction ratio of 6.45 to 1. The free-stream turbulence level in the 3.75 m long octagonal test section is 0.2% with a maximum test section velocity of about 60 m/s. Energy to the flow is given by a 2.67 m diameter eight-bladed fan driven by a 300 bhp DC motor.
The dataset prepared in this package relates to the publication "Experimental parameter study for passive vortex generators on a 30% thick airfoil". Pressure data over the surface of the DU97W300 airfoil is collected at a Reynolds number of 2 million, for 41 different vortex generator configurations. These cases are described in a README accompanying this data. The sensitivities to the different vortex generator parameters and analysis of further results can be found in the article which will appear in the Wind Energy journal.
The test case was performed in the Laminar Wind Tunnel (LWT) of the Institute of Aerodynamics and Gas Dynamics (IAG), University of Stuttgart, Germany.
NOWITECH, ReaTHM (Real Time Hybrid Model testing) in SINTEF Ocean basin. A semisubmersible wind turbine will be tested in the ocean basin of SINTEF Ocean, Trondheim, Norway. The model of the floating wind turbine will be anchored in the center of the basin. The mooring system is a spread mooring and the water depth is selected to be 200m. The wind will be modeled in the experiments by use of Hardware in the Loop setup where the wind is simulated in real time by use of Aerodyn. The aerodynamic loads in surge, roll, and yaw are then applied on the model by use of 6 actuators. The actuators apply forces by use of a motor-spring assembly. The model scale is 1:30. This scale will be suitable with respect to the quality of the waves, the model size and the handling of the models in the test set-up. The model tests with the floating offshore wind turbine are intended to take place during weeks 39 and 40 (i.e. by the end of September).
Contact: Dr Petter Andreas Berthelsen PetterAndreas.Berthelsen@sintef.no