Wind Tunnel Technology

Where was the first closed circuit wind tunnel built?

• Salzberg

• Gottingen

• Milan

Who built the first wind tunnel?

• Brunel

• Gustav Eiffel

• Stephenson

Why do most car racing teams use closed loop wind tunnels?

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Why do closed loop wind tunnels need to be cooled?

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Why is the fan mechanically isolated from the ground and the structure of the tunnel by a seismic mass?

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What fluid dynamic problems do fans introduce into the air flow?

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Why are static vanes placed downstream of the fan?

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What is the maximum air velocity in the Sauber wind tunnel

• 288km/hr

• 540m/s

• 80 m/s

Why does the cross section of the wind tunnel expand progressively after the fan, until it reaches the contraction just before the test section?

• It maintains the working area of the tunnel by compensating for the build up in boundary layer.

• It reduces the friction losses between the air and the wall of the wind tunnel.

What are the disadvantages of a closed loop wind tunnel?

• High cost of construction.

• More difficult to operate and maintain than an open loop tunnel.

• Takes up greater space than an open loop tunnel.