Wind Tunnel

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Wind Tunnel

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A tubelike structure or passage, sometimes continuous, together with its adjuncts, in which a high-speed movement of air or other gas is produced, as by a fan, and within which objects such as engines or aircraft, airfoils, rockets (or models of these objects), etc., are placed to investigate the airflow about them and the aerodynamic forces acting upon them. </dd>
Tunnels are designated by the means used to produce the gas flow, as hot shot tunnel, arc tunnel, blow down tunnel; by the speed range, as supersonic tunnel, hypersonic tunnel; or by the medium used, as plasma tunnel, light gas tunnel. </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use