Glossary
Aeronautical Wind Tunnels. Achitecture, Testing Process, Measurements Techniques

Vein tuning; tunnel calibration

Operation designed to determine the flow occurring in the empty section of a wind tunnel.

Priming; nozzle starting

Switching from subsonic to supersonic flow in a nozzle.

Ascendance; upwash tunnel

Angle between the wind and the vein axis in the vertical plane.

Scales; Scales

Force measurement device.

Bruit de fond; background noise

Noise in the test section in the absence of a model.

Chambre de tranquillisation; settling chamber

Area of the aerodynamic circuit designed to homogenize the flow upstream of the test section.

Choc ; Shock

Abrupt and dissipative deceleration of a supersonic compressible flow.

Straight shock; normal shock

Shock orthogonal to the flow.

Nozzle throat; nozzle throat

Part of the nozzle with the minimum flow cross-section.