www.vtt.fi

Icing wind tunnelVTT icing wind tunnel serves testing and verification

of products and concepts. The tunnel is located

inside a climate chamber which allows wide variety

of testing conditions based on customer needs.

The combination of low running costs and high

competence of personnel make this facility a unique

possibility for trying out new ideas, functionality of

prototypes, design optimisation, and verification of

products in controlled environment.

Business from technology

Examples of tests•Coatings

•Ice detectors

•Wind sensors

•Aerodynamic profiles

•Air intake screens and filters

•Structural elements

Icing wind tunnel layout, side view.

Modular ductSpray bars

3x3 nozzle matrix

From fan

Test section,top removable

Heated glass700 x 700 x 1000

1250 x 1250 x 1250

Turn for more information

Property Range in the facility

VTT’s Reference conditions

In-cloud icing, stationary

components

In-cloud icing, wind turbine rotor blades

Temperature [

C] -20…+30 -5 -5

Wind speed [m/s] 0…45 7 40

Water content [g/m³] 0.1…1.0 0.2 0.2

Droplet size, MVD [μm] 20…50 20 20

Geert-Jan BlueminkKey Account ManagerWind energy, energy systemsTel. +358 40 550 0461Email: geert-jan.bluemink@vtt.fiP.O. Box 1100, FI-90571 Oulu, Finland

Additional information

Droplet size and wind speed profile have been verified using shadow imaging.

Tomas WalleniusResearch ScientistWind power technologiesTel. +358 400 174 953Email: tomas.wallenius@vtt.fiP.O. Box 1000, FI-02044 VTT, Finland

Droplet size distribution. Anemometer in test.

40

35

30

25

20

15

10

5

0

Diameter [mm]0 0.05 0.1 0.15

%

o

Technology and market foresight • Strategic research • Product and service development • IPR and licensing • Assessments, testing, inspection, certification • Technology and innovation management • Technology partnership

VTT TECHNICAL RESEARCH CENTRE OF FINLAND