Applied Aerodynamics

Lille Water Tunnels

Types of research

• Separated flows

• Drag reduction mechanisms

• Wakes

• Development of optical methods

Characteristics

• Tunnel A:  
  • Vertical test section, 1 m long, section 140 x 140 mm², with four windows of shadowgraph and interferometer quality in two directions of visualization. The visualization field measures 400 x 100 mm²
  • The flow is gravity-driven and regulated to a given rate by a servo system
  • In continuous mode, the flow rate range is from 0 to 120 liters/minute, with an accuracy of 0.5 %
  • Maximum velocity: 10 cm/s

• Tunnel B:  
  • Vertical test section, 1 m long, section 300 x 300 mm², with four windows of shadowgraph and interferometer quality in two directions of visualization. The visualizable field is 800 x 300 mm²
  • The flow is regulated to a given rate by a servo system
  • Maximum velocity: 1 m/s

Equipment, measurement, visualization

• Two Onera/IMFL shadowgraph-interferometers using two continuous 150 W Xenon sources

• Two stroboscopes with frequencies adjustable from 0 to 500 Hz, flash time 17 ms, flash energy 0.5 joules

• Two Sony video systems (3-CCD 325P camera, Umatic SP9600P VCR, PVM 2130 monitor)

• Lasers: four-cavity ruby laser, argon laser, dye laser, helium neon laser

• Laser Doppler velocimetry, holographic velocimetry

• Shadowgraph associated with thermal marking technique

• Dye emission visualization (ribbons, sheets)

• Particle Image Velocimetry (PIV)

Last Update:4 April 2006 - © ONERA 2009 - Terms of use