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Wind tunnel 825540-G

Wind-tunnel-825540-G

Wind tunnels are machines with a large tube that air blows through them. They are designed for specific purposes. For example, Aerodynamicists use wind tunnels to model the aircraft and even spacecraft.

There are different types of wind tunnels and Wind tunnel 825540-G is a closed return wind tunnel which is also called a Gottingen tunnel named after the research laboratory in Germany where the tunnel was used for the first time.

Although, there are numerous advantages for Eiffel (open return) tunnels as mentioned in Wind Tunnel 825535-E; closed return wind tunnels have many other advantages and most of the large research wind tunnels in NASA are closed return (Gottingen) tunnels.

One of the most noticeable advantages of Westenberg’s Wind tunnel 825540-G, as a Gottingen tunnel is that when the air starts circulating in the tunnel; the motor and the fan overcome losses through the turning vanes and along the wall.

As such, the fan doesn’t need to accelerate the air continuously. Therefore, it makes the operation cost-effective.

Advantages of Gottingen tunnels:

  • Low cost of operating.
  • Quieter operation in comparison with an Eiffel tunnel.
  • High-level flow quality in the test section.
  • Flow straighteners near the test section and flow turning vanes in the corner ensure uniform flow in the test section.

Technical specification of Wind tunnel 825540-G:

  • Length of working section: 320 mm
  • Diameter of jet outlet: 255 mm
  • Flow velocity: 0.3 m/s to 40 m/s (50 meters sea level)
  • Contraction ratio: 4
  • Fan connection: 3 x 400 Volt / 50 Hz
  • Turbulence ratio by 20 m/s: 0.3 to 0.5 %
  • Dimensions (Width x Height x Length): 840 x 2.300 x 4.006 mm + (400 mm for control unit)
  • Motor output: 300 kW

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