During the plenary Avatar meeting in Copenhagen on December 2014, it was decided to organize a blind test campaign in order to compare several tools with each other and then with the measurements. This blind test is also open to research centers, universities and industry who are not involved in Avatar project.
Case 1: High Reynolds number characterization of DU00-W-212 airfoil: wind tunnel tests performed in the pressurized DNW-HDG wind tunnel.
Case 2: FFA-W3-241 Airfoil equipped with vortex generators at Re=1.5e6 performed in the wind tunnel of NTUA
Case 3: DU95W180 airfoil with dynamic flap in steady and unsteady flow at Re=1.0e6 performed in the wind tunnel of TUDelft.
The results of the blind test were presented at a side event during the next EWEA conference in November 2015 in Paris.
Web based validation platform
Several documented validation cases are and will be uploaded on the AVATAR site in the form of a web based validation platform.
Until now the following cases from WP3 (flow devices) are uploaded.
WP3 Part A
2D cases with Experimental data
DU97 W 300, Re=2 10^6
NTUA18, Re=0.87 10^6
Zero & Adverse p.grad.
TE Flap static
TL 190-82, Re=3.3 10^6, width=10%, rigid
TE Flap dynamic
TE Flap dynamic
DU95 W 180, Re=1.0 10^6, flap=20%, M=0.073
Will be supplied after EWEA 2015
Tripped at 5% suction (top) side and 10% at pressure (bottom) side
At the 35th AIAA Wind Energy Symposium from 9-13 January 2017 in Texas USA these presentations were given:
- A computationally-effect panel code for unsteady airfoil modelling including dynamic stall
- Improving Airfoil Lift Prediction
- Summary of the Blind Test Campaign to predict the High Reynolds number performance of DU00-W-210 airfoil
An oral presentation was given at the 69th Annual meeting of the American physical Society-Division of Fluid Dynamics (APS-DFD 2016) find the link here.
These three oral presentations were given during STAB 8-9 November 2016
- Hybrid RANS/LES simulations of the three-dimensional flow at root region of a 10 MW wind turbine rotor
- CFD study of trallinf edge flaps for load control on wind turbines
- An Experimental Setup for Airfoil Characterizations in Customized Turbulent Flow
The following papers were submitted at the Science of Making Torque conference in October 2016:
- Results of the AVATAR project for the validation of 2D aerodynamic models with experimental data of the DU95W180 airfoil with unsteady flap
- Experimental benchmark and code validation for airfoils equipped with passive vortex generators
- Point vortex modelling of the wake dynamics behind asymmetric vortex generator arrays
- Investigations of the inflow turbulence effect on rotational augmentation by means of CFD
- Computing the flow past Vortex Generators: Comparison between RANS Simulations and Experiments
- Latest results from the EU project AVATAR: Aerodynamic modelling of 10 MW wind turbines
- Application of the lifting line vortex wake method to dynamic load case simulations
- Effects of ambient turbulence on the near wake of a wind turbine
- Forced pitch motion of wind turbines
- Analysis of high Reynolds numbers effects on a wind turbine airfoil using 2D wind tunnel test data
- Edgewise Vibrations of the AVATAR Rotor Blade
- CFD computations of the second round of MEXICO rotor measurements
- Simulations of wind turbine rotor with vortex generators
- Experimental airfoil characterization under tailored turbulent conditions
During the 2016 Windturbine Blade Workshop, Sandia National Laboratories in the USA, this presentation was given by Gerard Schepers.
At the EERA Deepwind Trondheim, Norway Gerard Schepers gave the presentation: Advanced Aerodynamic Tools for 1arge Rotors
Four oral presentations were given during the IRP conference 2016 in Amsterdam:
-Introduction of the project by Gerard Schepers, ECN
-Advanced aerodynamic modelling by Niels N. Sørensen, DTU Wind Energy
-Flow device aerodynamics by Alvaro González, CENER
-Roadmap for further improvements by Gerard Schepers, ECN and Niels N. Sørensen, DTU Wind Energy
Two extended abstracts from Eva Jost and Galih Bangga (University of Stuttgart) where presented at the EAWE PhD seminar from 23rd till 25th of September 2015 in Stuttgart Germany. Gerard Schepers (ECN) gave a keynote lecture at the same seminar.
A paper which was presented by University of Liverpool in May 2015 at the DEWEK conference in Bremen, Germany, can be found here.
At the 33rd ASME Wind Energy Symposium which was held from January 5th until January 8th, 2015, two papers on AVATAR were accepted for oral presentations. For more information please click on here and here.
A presentation on High Reynolds Number Effects is given by Özlem Ceyhan and Herman Snel (ECN) at the European Fluid Mechanics Conference in Copenhagen on 17 September 2014. For more information please go to this link.
Also Niels Soerensen (DTU) gave a presentation on transition modelling at High Reynolds numbers at that conference . For more information go to this link.
These three papers where presented during The Science of making torque from wind, 18-20 June 2014, Copehagen, Denmark.
- Simulations of the Yawed MEXICO Rotor Using a Viscous-Inviscid Panel Method by DTU
- A New Tip Correction Based on the Decambering Approach by DTU
- Inviscid double wake model for stalled airfoils by DTU
For an overview of INNWIND.EU publications please go to this link.
The following deliverables have been finished.
- D1.1 Reference Blade Specification
- D1.2 Reference Blade Design (report and Excel file)
- D1.3 Comparison of the INNWIND and AVATAR Research Wind Turbines
- D1.4 Inventory of aerodynamic models
- D2.1 2D Airfoil polars for the AVATAR rotor
- D2.2 Coordination of Wind Tunnel Measurments
- D2.3 Power Curve Predictions
- D2.4 Aerodynamics of Large Rotors
- D2.5 Effects of inflow turbulence on large wind turbines
- D3.1 CFD and experimental database of flow devices, comparison
- D3.2 Development of aerodynamic codes for modelling of flow devices on aerofoils and rotors
- D3.3 Results of a parametric study of flow devices, guidelines for design
- D4.1 Comparison of models with respect to Stability analysis of the AVATAR RWT
- D4.2 Validation of advanced models against measured data
- D4.3 Comparison of models with respect to Load analysis in extreme yaw
- D4.4 Comparison of models with respect to load analysis in extreme shear and half wake
- D4.5 Aerodynamics of Large Rotors
- D4.6 Comparison of Aerodynamic Models for Calculation of Fatigue Loads in Turbulent Inflow
- D4.7 Turbulence Intermittency
- D5.8 Proceedings of first in-depth workshop
Please note that some of the reports have not formally been approved yet by the European Commission.