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Wind Tunnel   |   Motion Simulator   |   Full Scale Measurement   |   Computational Fluid Dynamics

A wind tunnel is an experimental tool for the study of wind and its effects on both structures and the environment. The CLP Power Wind/Wave Tunnel Facility has a state-of-the-art subsonic boundary layer wind tunnel with two parallel wind tunnel test sections (high-speed and large cross-section) for civil/structural engineering and environmental engineering applications.

Both test sections can also be used for smooth flow and low turbulence applications, such as the aerodynamic testing of bridges, cables and aerofoils.

In its basic configuration, the wind tunnel forms a closed-loop for enhanced efficiency. For gas dispersion studies, the wind tunnel can be converted to from closed-loop to open-circuit by virtue of purge doors in the return leg connecting the low and high speed sections.

Facts & Figures
   Overall size    61.5 m long x 16.5 m wide x 7.5 m high
   High-speed wind tunnel    29.2 m long x 3 m wide x 2 m high
        Turbulence intensity    < 0.5%
        Flow uniformity    < ±0.5%
        Flow angularity    < 0.5°
        Contraction ratio    3.33 : 1
   Large cross-section wind tunnel    41 m long x 5 m wide x 4 m high
   Flow conditioning elements for both test sections    Honeycomb / screens
   Water tank    41 m long x 5 m wide x 3 m water depth
   Fan type    Axial flow
   Fan diameter    2.5 m
   Power    170 kW
   Speed regulation    variable speed + manually variable pitch
   Heat exchanger    ±1°C

The high-speed wind tunnel contains 399 computer controlled, pneumatically operated roughness elements for development of various types of turbulent boundary layer flow and an integrated computer control for the roughness elements, turntable orientation and fan speed.

The low speed wind tunnel is located directly above the water tank. Ten liftable floor sections can be raised to expose the water surface beneath.

Wind Tunnel Instrumentation

The CLP Power Wind/Wave Tunnel Facility is equipped with the following instrumentation:

  • high frequency force balance - typically used for measuring the overall loads on a models for strength design;
  • aero-elastic base balance – used for overall wind loads and response for structures which are aerodynamically sensitive and also used for research purposes;
  • high speed pressure scanner system for measuring surface wind pressures on a body – typically used in cladding pressure and/or structural pressure studies;
  • miniature hotfilm anemometers – typically used for calibration purposes, wind velocity measurements ,and pedestrian level wind environment studies;
  • Cobra Probes - used for calibration purposes and wind velocity measurements;
  • fast flame ionisation detector – used for gas dispersion studies;
  • flow visualisation equipment;

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