Blind test

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.

For the blind test campaign, three cases will be used. In this document and underlying data files, the test cases are described and the analysis conditions are given. The selected test cases are:

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.

 

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Web based validation platform

Several documented validation cases are uploaded on the web based validation platform. Please go to this link to visit the Windbench platform.

The data of the blind test are also available at the Windbench platform.

Publications

2017

Numerical Simulations of a large offshore wind turbine exposed to turbulent inflow conditions was presented by Galih Bangga (University of Stuttgart) at the 9th European Seminar OWEMES 2017

CFD studies on rotational augmentation at the inboard sections of a 10MW wind turbine rotor was published by Galih Bangga (University of Stuttgart) at the Journal of renewable and sustainable energy 9, 023304 (2017)

Assessment and Calibration of the y-Equation Transition Model at Low Mach was submitted by S. Colonia, V. Leble, R. Steijl and G. Barakos (University of Glasgow) at AIAA 2017 

At the 35th AIAA Wind Energy Symposium from 9-13 January 2017 in Texas USA these presentations were given:

  1. A computationally-effect panel code for unsteady airfoil modelling including dynamic stall
  2. Improving Airfoil Lift Prediction
  3. Summary of the Blind Test Campaign to predict the High Reynolds number     performance of DU00-W-210 airfoil 

This paper was accepted for publication, AIAA journal. Title: Assessment and Calibration of the y-Equation Transition Model at Low Mach

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:

2016

CFD analysis of 10 MW wind turbines was submitted by Vladimir Leble, Yaxing Wang and George Barakos for the DEWEK 2015

Hybrid RANS/LES simulations of the three-dimensional flow at root region of a 10MW wind turbine rotor was presented by Galih Bangga (University of Stuttgart) at the STAB 2016 Symposium, Braunschweig, Germany. This article has been accepted in the Springer book: Notes on Numerical Fluid Mechanics and Multidisciplinary Design

During the 2016 Windturbine Blade Workshop, Sandia National Laboratories in the USA, this presentation was given by Gerard Schepers.

Stall-Induced Vibrations of the AVATAR Rotor Blade was presented at the Science of making Torque from Wind

Analysis of the high Reynolds number 2D tests on a wind turbine airfoil performed at two different wind tunnels was presented by Oscar Pires (CENER) at the Wind Europe Summit 2016 at Hamburg (September 29th 2016)

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

Improving Airfoil Drag Prediction was presented by Huseyin Ozdemir (ECN) at the 35th AIAA Wind Energy Symposium, Texas USA

2015

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.

  • AVATAR: AdVanced Aerodynamic Tools for lArge Rotors can be found here 
  • Simulation of a MW rotor equipped with vortex generators using CFD and an actuator shape model can be found here.

2014

Hybrid aerodynamic analysis of wind turbines was presented published by B. Schwarz, B. Stoevesandt, J. Peinke at the 10th EAWE PhD Seminar on Wind Energy in Europe.

CFD studies of a 10 MW wind turbine equipped with active trailing edge flaps was presented by Eva Jost (University of Stuttgart) during the 10th EAWE PhD Seminar on Wind Energy in Europe. The paper and presentation can be found here.

Challenges in High Reynolds Number Flows for Large Offshore Wind Turbines is presented 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.

Prediction of airfoil performance at high Reynolds numbers was presented by Niels Soerensen (DTU) at the 10th European Fluid Mechanics Conference in Copenhagen, September 2014. 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.

For an overview of INNWIND.EU publications please go to this link.

Deliverables

The following deliverables have been finished.

Please note that some of the reports have not formally been approved yet by the European Commission.

Links

Innwind.eu