F2 Wind Tunnel overview

 

The F2 subsonic continuous flow wind tunnel is a research facility allowing the use of large size models.

Sting set-up

Motorised floor turret

• Test section dimensions:
  • length: 5 m,
  • width: 1.4 m,
  • height: 1.8 m.

• The wind tunnel is equipped with a 12 bladed fan driven by a 680 kW direct current motor. The velocity can be continuously varied from 0 to 100 m/s by adjusting the motor speed, with fully automated control within +/-0,1m/s.
• The total temperature is controlled in ± 0,5°C by a water cooler.
• The settling chamber is equipped with 4 screens, and a honeycomb filter, which, in conjunction with a contraction ratio of 12, supply a flow with a very low level of turbulence in the test section (less than 0.05 %).
• Lateral, ceiling and floor walls can be adapted to the test. The set of available walls includes glass walls for optical access.
• A dedicated bench motorized along the three axes allows displacement of optical measurement systems for flow survey around the model.
• A specific wall element is dedicated to motorized flow survey.
• Compress air up to 9 bar available for cold or hot jet simulation.

MEASUREMENT TECHNIQUES

• Three components Laser Doppler Velocimetry (LDV).

• Stereo Particle Image Velocimetry (SPIV)

• Flow visualization by laser sheet.

• Visualisation by coloured oils.

• InfraRed Thermography (IRT).

• Flow survey (hot wire, thermocouple, pressure rake …).

• Available on demand: Time Resolved PIV (TR-PIV), Background Oriented Schlieren (BOS), Pressure Sensitive Paint (PSP), acoustic measurement with wall-mounted microphone array.

TYPICAL TESTS

• The wind tunnel is well adapted to study complex flow phenomena (three dimensional boundary layer, flow separation, jet interaction, wakes...)
• Boundary layer transition.
• Two-dimensional airfoil tests.
• Aeroacoustics.
• Dynamic and static stall.
• Active flow control (vortex generator, plasma actuators ...)
• Probe calibration.