Subsonic and transonic wind tunnel

Type of wind tunnell

Subsonic wind tunnels are used for operations at low Mach numbers, with speeds in the test section up to 480 km/h. They may be of open-return type or closed-return flow. These tunnels use large axial fans to move air and increase dynamic pressure, overcoming viscous losses. The design principles of subsonic wind tunnels are based on the continuity equation and Bernoulli's principle, which allow for the calculation of important parameters such as the tunnel's contraction ratio.

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