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By the beginning of World War II, the company was also making wooden-bladed ventilation fans and wind tunnels. Jicwood Ltd., the subsidiary company, manufactured fully compressed wood for various purposes. An extremely light sandwich material which consists of expanded rubber between either plywood or a light alloy were also manufactured.
The tunnel was the world’s first fully transparent recirculation wind tunnel, allowing spectators to view the performances from all sides. [ 10 ] 2013 saw the introduction of a new wind tunnel application when Aerodium built the world's first tunnel suited for indoor BASE jumping at the “Sirius Sport Resort” in Finland . [ 11 ]
A sample wind tunnel layout showing some typical features including a test section and control room, a machine for pumping air continuously through ducting, and a nozzle for setting the test airspeed. A wind tunnel is "an apparatus for producing a controlled stream of air for conducting aerodynamic experiments". [1]
The flow is axial at entry and exit. The fan is designed to produce a pressure difference, and hence force, to cause a flow through the fan. Factors which determine the performance of the fan include the number and shape of the blades. Fans have many applications including in wind tunnels and cooling towers.
In 2012, wind tunnel tests were completed on an earlier version of the fan and in 2015, 275h of testing were completed on a fan rig. More than 175h of ground testing of key components were completed in October 2017, on a shorter duct inlet, a part of the nacelle and a fan with lower-pressure ratio blades, significantly fewer than the 20 blades ...
ANSI/AMCA Standard 250 - Laboratory Methods of Testing Jet Tunnel Fans for Performance was developed in response to the need for a standard method of testing jet tunnel fans, sometimes called impulse fans, which have seen increasing use in the United States. The test procedures outlined in this standard are in harmony with those found in ISO 13350.
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