Reference project WT237

Ammonit Windtunnel GmbH

In Bargeshagen near Rostock, the WT237 wind tunnel was installed in the test laboratory of the company  Ammonit Wind Tunnel GmbH. The wind tunnel is characterized by the low degree of turbulence, the high accuracy of the wind speed and the large test section with simultaneous high contraction and compact design. The WT237 forms the core of the laboratory accredited according to “DAkkS”, “measnet” and “DKD”.


  • Low turbulence level
  • High accuracy of wind speed
  • High contraction
  • Large test section
  • Compact design
  • Test section with turn-swing unit
  • Part of a laboratory accredited according to “DAkkS”, “measnet” and “DKD”


Product description

Basic structure
The WT237 consists of a steel profile welded construction and galvanized sheet metal. The additional painting gives the wind tunnel an attractive appearance and is also protected against corrosion. Large manholes in all relevant segments make it easy to enter the inside of the wind tunnel.

The WT237 is driven by a vibration-decoupled axial fan. This is mounted on spring vibration dampers. The fan is connected to the wind tunnel via canvas flanges. This ensures low-noise plant operation.

Flow preparation
The WT237 has non-expanding corners. The sieve chamber contains four sieves at an optimal distance from one another. These non-split stainless steel sieves are accessible via manholes for easy cleaning; the sieves do not have to be dismantled for this purpose. A honeycomb straightener with a length-to-diameter ratio of 8: 1 further reduces the swirl of the flow. In a nozzle, the nozzle geometry of which corresponds to a polynomial of the fifth order, the flow is prepared and any turbulence that may be present is suppressed.

The measurement in the wind tunnel takes place with the test section half open. A turn-swing unit for the multi-dimensional calibration of ultrasonic anemometers is installed in this test section. The test section has a flow collecting funnel to reduce the flow losses during the measurement. 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 WT237 is equipped with a three-axis traverse. The wind tunnel is used to calibrate cup cross anamometers. For this purpose, the system must be operated almost continuously every working day.


Design type Closed loop, standing
Measuring cross section 1200 x 1200 mm
Measuring length 2000 mm
Top speed 30 m/s
Turbulence level 0,4 %

Datasheet WT237 with closed test section

Photo Gallery