Facility characteristics

  • Water tank : 40 m long, 2.6 m wide and 0.9 m deep at the main test section,
  • Air tunnel : 40 m long, 3.2 m wide and 1.5 m high at the main test section,
  • The wind flow is generated by an axial fan of 2 m in diameter located in the 61 m long recirculating air tunnel and driven by a computer-controlled 55 kW motor. The reference wind speed in the test section ranges between 0.5 and 14 m/s. Steady or accelerated-decelerated air flows at a maximum rate of 0.6 m/s2 can be programmed.
  • The wavemaker consists of a submerged piston-type paddle of section 2.6 x 0.4 m2 located a cavity below the air-water flow junction device which can operate with a maximum stroke of 0.22 m and a maximum velocity of 0.5 m/s. The wave generation is controlled by a electro-hydraulic motor driven by a computer.
  • Two helicoïdal pumps can generate within the full water tank a current flowing with or against the wind direction at a maximum velocity of 0.1 m/s. Spatial current variations can be created over selected parts of the tank by setting up false walls or bottom.
  • The wave-absorbing permeable beach is made of a layer of adjacent thin pipes covered with a 9 m long perforated metallic plate inclined at an angle of 7 degrees relative to the horizontal plane.
    PNG - 610.3 ko
    Figure 06

    Schematic views and picture of the facility test section :
    a) Sketch of the longitunal section with the roof opening at 26 m fetch.
    b) View of the large glass windows on both sidewalls of the air tunnel and the glass window on the left sidewall of the water tank, at 26 m fetch (copyright : H. Branger).
    c) Sketch of the cross section of the facility test section.

    Crédit : G. Caulliez & H. Branger (picture b)