A tunnel with a large fan that is used by engineers to test the effects of high winds on a structure.
A wind tunnel is a tube like 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, etc., are placed to investigate the airflow about them and the aerodynamic forces acting upon them.
The exit duct of a wind tunnel used for accelerating the working fluid and producing a desired direction, velocity, or shape of discharge. The fluid′s pressure decreases as it leaves the nozzle. The nozzle usually has an increasing cross-section in the direction of the flow.
Any one of the geometrical axes of a wind tunnel.
See also: Airflow, Altitude Wind Tunnel, Blowdown Wind Tunnel, Closed Circuit Wind Tunnel, Expansion Tube Tunnel, Intermittent Wind Tunnel, Moving Ground Plane Wind Tunnel, Piston Driven Wind Tunnel, Shock Tunnel, Suckdown Wind Tunnel, Wind Tunnel Balance.