Reference project WT371

Wind tunnel for operation in refrigerated containers

The WT371 windtunnel was built for an international customer. The windtunnel is characterized by high performance, low-noise operation and air exchange flaps. The WT371 was designed for operation in refrigerated containers.​


  • double fan – high performance
  • two silencers – quiet operation
  • turn-tilt-device

Product description

Basic structure
The WT371 consists of a steel profile welded construction and sheet steel. Painting with scratch-resistant 2K paint gives the wind tunnel an attractive look and protects it from corrosion. The WT371 is operated in a 40′ HC refrigerated container. This enables measurement at constant air temperatures. For air exchange between the refrigerated container and the wind tunnel, the WT371 has 2 air exchange flaps in each of the deflection corners, which can be opened separately.

Refrigerated container

The refrigerated container was specially converted for the project. Access is now on the side, via a platform. The inside of the container can be accessed through a security door with a panic lock. The door is lockable from the outside, but can be opened from the inside at any time.

The floor of the container was covered with anti-slip composite panels and the ceiling was equipped with lighting. In the front part of the container, sockets for power supply and network sockets for internet connection and for controlling the wind tunnel were installed. The customer subsequently set up a workstation here to operate the wind tunnel.
Thanks to the two silencers before and after the WT371’s drive motors, noise emissions are reduced to a safe level even at top speed.

The WT371 is driven by two axial fans connected in series. The fan, which is mounted on spring shrinkage dampers, is connected to the wind tunnel via canvas flanges. This ensures low-vibration system operation.

The long diffuser is equipped with dividing plates on the inside to counteract flow separation. The wind tunnel has a large settling. This contains three screens at an optimal distance from each other. These non-divided stainless steel screens are accessible via inspection hatches for easy cleaning. A honeycomb flow straigthener with a length-to-diameter ratio of 8:1 further reduces the swirl of the flow. In a nozzle whose nozzle geometry corresponds to a fifth-order polynomial, the flow is accelerated and any turbulence that may be present is suppressed.

The measurement in the wind tunnel takes place in the easily accessible, closed testsection. The interior of the closed testsection can be seen through glass windows, which swing upwards when opened using a damping mechanism. The recording of flow characteristics using optical measurement methods, e.g. PIV (Particle Image Velocimetry) or LDA (Laser Doppler Anemometry) is possible without any problems. The testsection has a turn-tilt mechanism. Models in the wind tunnel can therefore be rotated ±45° around the vertical axis and ±15° around the transverse axis.


Type Göttinger type standing
Measuring cross section 450 x 450 mm
Measurin length 850 mm
Top speed 80 m/s
Turbulence level 0,25 %

Datasheet WT371

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