5 to 105 m/s speed range

The 4.0m Low Speed Wind Tunnel is a closed return tunnel.  The largest stream wise section occurs just upstream of the contraction where it is 9.1m high and 12.5m wide.  Cascades of vertical vanes are positioned at each corner to assist with uniform turning of the air. The air is continuously diffused through the circuit to minimize total head losses.  The fan nacelle is situated opposite the working section where the tunnel section is changed from octagonal to circular (7.3m diameter at the fan).  The air is accelerated into the working section through a 10.6 to 1 contraction ratio. The working section is nominally 4.0m wide and 2.7m high with 45º fillets.  A vent door is provided in the fourth diffuser to facilitate exhaust of hot or contaminated air.

The facility contains a flexible data acquisition system that can accommodate a wide variety of sensors.

Compact pressure scanning hardware is also available, that can provide over 1000 pressure measurements.

Under floor, virtual-centre, weigh beam. Single or multiple struts, variable separation. Sting or Strut mounting systems, 2 floor mounted and 1 roof mounted turntables  

Ground board

High Pressure Air Supply pressure 4,200 kPa max. Four independently regulated, high pressure air supplies.

Mass flow 4kg/s continuous or 8kg/s max.