8/4/2019 bruwind-110409043815-phpapp01

1/23

1

8/4/2019 bruwind-110409043815-phpapp01

2/23

2

Wind Topics @ BruWind Research Groups

2

Noise & Vibration

Research group: Acoustics and Vibration AVRG

Topics: Operational Modal Parameter Estimation, Load and Source Identification,

Structural Health Monitoring, Advanced measurement techniques

Strength & Materials

Research group: Mechanics of Materials and Constructions MEMC

Topics: Composite materials, Biaxial Material Behavior, Subcomponent testing

Aerodynamics and Aeroelastics

Research group: Fluid Mechanics & Thermodynamics FTRG

Topics: CFD simulation over complex terrains, Wind Farm Optimization

Simulation of individual wind turbines

Research group: Industrile Wetenschappen en Technologie IWT

Topics: Siting studies en wind resource assessment using CFD and wind measurements

Sensors and measurement techniques

Research group: Electrochemical and Surface Engineering SURF

Topics: Corrosion management Corrosion sensors

Research group: Vakgroep Toegepaste Natuurkunde & Fotonica - TONA

Topics: Optical Fiber Sensors

8/4/2019 bruwind-110409043815-phpapp01

3/23

3

Wind Topics @ BruWind Research Groups

Generator, Power Electronics, Grid Integration

Research group: Electrical Engineering and Power Electronics ETEC

Topics: Monitoring, Grid intergration

Control Systems and Automation

Research group: MECH

Topics: Controle algorithms

Environmental Issues

Research group: Acoustics and Vibration AVRG

Topics: Noise Pollution

Trading Energy, Wind energy Economics

Research group: Bedrijfseconomie en strategisch beleid - BEDR

Topics: Wind energy Economics

8/4/2019 bruwind-110409043815-phpapp01

4/23

4

AVRG ResearchDynamic Behavior of Wind Turbines

4

Operational Modal Parameter Identification

GOAL S:

Development of OMA techniques using transmissibility measurements Development of Operational Modal Analysis with Exogenous inputs Development of OMA solutions for non white-noise excitations and harmonics 1P, 3P, ..

Project: Operational Modal Analysis using transmissibility measurements (FWO Christof Devriendt)Transmissibility Function is a ratio

between 2 responses measuredduring a certain loading condition

8/4/2019 bruwind-110409043815-phpapp01

5/23

AVRG ResearchLoad and Source Identification

Load and Source Identification

GOALS:

Identifying time-varying wind loads on structures from in situ vibration response data using inversemethods

Identifying acoustic sources on structures from in situ pressure data using inverse methods

Project: Inverse identification of wind loads on structures (FWO project ism KULeuven)

{Q}

{P}[H]

-1

{Q}

[H]

8/4/2019 bruwind-110409043815-phpapp01

6/23

Structural Health Monitoring of Wind TurbinesGOALS:

Acquiring and testing state of the art monitoring systems e.g. fiber optic sensors Development of advanced data processing techniques SHM of blades, towers and foundations using OMA and Transmissibility measurements

Project: Offshore Wind Infrastructure Project (IWT project ism Sirris)

The development of an algorithm for structural health monitoring during

changing operational forces using distributed sensor networks transmissibilityfunctions as primary data

AVRG ResearchStructural Health Monitoring

8/4/2019 bruwind-110409043815-phpapp01

7/23

AVRG ResearchAdvanced measurement techniques

Non-contact measurement, visualization and analysis ofstructural vibrations

In combination with Modal Analysis software a strong tool todetermine the resonate frequencies, damping factors andmode shapes

Potential in the fields of modal analysis testing and structuralhealth monitoring of wind turbines

Long distant LDV can measure up to a distant of 200m

Long distant LDV

8/4/2019 bruwind-110409043815-phpapp01

8/23

CFD Simulations over Complex TerrainsFTRG ResearchCFD simulations over complex terrains

Wind Flow over complex terrainsNew Meshing Strategies (unstructured grids)

CFD is used to predict the wind over complex terrains Work together with Von Karman Institute

COOLFluiD code (http://coolfluidsrv.vki.ac.be/trac/coolfluid)RANS approach with wall functionsunstructured grids

8/4/2019 bruwind-110409043815-phpapp01

9/23

CFD Simulations over Complex TerrainsFTRG ResearchWind Farm Optimization

Wind Farm Layout optimization Wind Farm Control optimization

NOT acceptable layoutAcceptable layout

Work together with Von Karman InstituteOptimization based on

CFD simulations (COOLFluiD)Wind turbines modeled using actuator disk

Neural networksGenetic algorithmsRobust optimization using non-deterministic methods

Two optimizations are consideredWind farm layout: positioning of wind turbines in the farmWind farm control: power setting of individual turbines for

max wind farm production

8/4/2019 bruwind-110409043815-phpapp01

10/23

CFD Simulations over Complex TerrainsFTRG ResearchSimulation of individual wind turbines

Full 3D CFD simulations of individual wind turbinesprediction of power curveoptimization of blades for improved efficiency

RANS or LES modeling

Simulation of NREL windturbine: V=7m/s;Re=4E6

Massive separations near blade root

Streamlines of the flow on the blade

8/4/2019 bruwind-110409043815-phpapp01

11/23

MEMC Research in the field of WindBiaxial Material Behavior

=> Experimental data needed In-plane loading ofcruciform specimen

Biaxial behavior in e.g.

wind tubine blade Biaxial test method at MeMC

Cruciform specimen design

Glassfibre reinforced epoxy materialLayup frequently used for wind turbine blades

(LM Glassfibre)

8/4/2019 bruwind-110409043815-phpapp01

12/23

MEMC Research in the field of WindSubcomponent testing

sandwich

Blade root

Flanges, web,bondlines

Tests at the moment : small coupon tests or real bladetests

Aim = tests at mid-scale => subcomponent tests

4-point bending and cantilever tests on I-beams to test bonding in real blade

Acoustics & Vibration Research Group

Vrije Universiteit Brussel

C. Ramault1, A. Makris1, D. Van Hemelrijck1,

E. Lamkanfi2, W. Van Paepegem2

Optimat Blades Project & Upwind Project

8/4/2019 bruwind-110409043815-phpapp01

13/23

SURF ResearchCorrosion management

- Potential model (distribution),together with Elsyca (SURF Spin-off)

- Including cathodic protection (CP)predictions

- Possibility to integrate specificcorrosion effects (local corrosion,

galvanic coupling)- Influence of liquid film on structure- Influence of evolving splash zone

- Sensor to detect and quantifycorrosion taking place on structure

- Continuous and in-line monitoring(condition monitoring)

- Can be coupled with CP to reduceCP cost

-

Used to schedule repainting / repaircycles- Can cover specific targets or general

structure

Prototype

prediction validation

8/4/2019 bruwind-110409043815-phpapp01

14/23

SURF ResearchCorrosion sensors

Based on EIS (ElectrochemicalImpedance Spectroscopy)

interpretation step eliminated SOIB (Spin-Off in Brussels) project started

in 2009 goal to establish spin-off to produce /

distribute a corrosion sensor in 2013

8/4/2019 bruwind-110409043815-phpapp01

15/23

TONA RESEARCHMicrostructured optical fiber sensors

Microstructured optical fiber sensors successfullyembedded in carbon-fiber reinforced polymer

We achievedHighly improved transverse loadsensitivityInsensitivity to temperatureIndustrially relevant sensorperformance for CFRPs

Transversal load sensitivity of our sensor is10x larger than in state-of-the-art fibers

8/4/2019 bruwind-110409043815-phpapp01

16/23

EhB Research Wind EnergyMicro-siting

?

Determine optimal location for turbine(s) on given

siteEspecially complex terrain, incl. (semi-)builtenvironment

?

?

?

?

8/4/2019 bruwind-110409043815-phpapp01

17/23

EhB Research Wind EnergyMicro-siting

CFD: Mainly OpenFOAM

Site geometry from google earth, geographical data, +total station measurements

8/4/2019 bruwind-110409043815-phpapp01

18/23

Wind measurements 2D cup and 3D ultrasonic

Combined with historical wind data,

power curves of wind turbinesresource assessment

EhB Research Wind EnergyMicro-siting

8/4/2019 bruwind-110409043815-phpapp01

19/23

EhB Research Wind EnergyAero-elasticity

Modal analysis

FSI, frequency lock-inFlutter prediction methods

8/4/2019 bruwind-110409043815-phpapp01

20/23

EhB Research Wind EnergyFlow control

Load alleviation through smart blades (flaps,

micro-tabs, vortex generators, ...)CFD and experimental

8/4/2019 bruwind-110409043815-phpapp01

21/23

Ongoing Projects in the field of Wind

Project: Offshore Wind Infrastrcutere Project Wind (IWT project ism Sirris)

Domain: Monitoring van Offshore Wind Turbines - CMS - O&M

Research group: Acoustics and Vibration - AVRGContact Person: Patrick Guillaume, Christof Devriendt

Project: UpWind is a European project funded under the EU's Sixth FrameworkProgramme (FP6).Domain: Composite materials for large blades

Research group: Mechanics of Materials and Constructions - MEMC

Contact Person:Danny Van Hemelrijck

Project: Wind Farm Optimization Based on CFD Modeling and Simulations (ism VKI)

Domain: CFD van Wind Farms en Wind Turbines

Research group: Fluid Mechanics & Thermodynamics - FTRG

Contact Person: Chris Lacor

Project: Inverse identification of wind loads on structures (FWO project ismKULeuven)

Domain: Load and source indentificationResearch group: Acoustics and Vibration - AVRG

Contact Person: Patrick Guillaume

8/4/2019 bruwind-110409043815-phpapp01

22/23

Ongoing Projects in the field of Wind

Project: Gebruik van microwindturbines voor het leveren van hernieuwbare energieaan particulieren en kleine bedrijven (IWT Tetra project)

Domain: Ontwerp nieuwe concepten kleine Wind TurbinesOnderzoeksgroep:

Research group: Mechanica Mech

Contact Person: Mark Runacres, Tim De Troyer

Project: EMOVO Multidisciplinair onderzoeks- en vormings-centrum rond energie enmilieu technologieen

Domain: creatie van een multidisciplinair ontwikkellings- en vormings-centrum rond energie-enmilieutechnologien

Research group: Department Mechanica Mech

Contact Person: Mark Runacres, Tim De Troyer

8/4/2019 bruwind-110409043815-phpapp01

23/23

23

Contact:Dr. ir. Christof Devriendt

Vrije Universiteit Brussel | Pleinlaan 2 | B-1050 Brussel | Belgium

Dept. of Mechanical Engineering | Acoustics & Vibration Research Group

Tel. +32 2 6292390 | Fax +32 2 6292865 | GSM +32 477412049

Mail: christof.devriendt@vub.ac.be