The Adverse Pressure Gradient Wind Tunnel is an
open-return low-speed wind tunnel. Briefly, it has a 7.5 m
overall length and a 17:1 contraction ratio of the bell-mouth
nozzle section. The diffuser is 2.3 m long with a continuous
transition from the rectangular test section to the circular
fan housing. The test section is 3 m long by 0.3 m wide. The
ceiling of the wind tunnel consists of thirty-six individual
Plexiglas sheets, which are used to adjust the test-section
geometry for a specific adverse pressure gradient
configuration. Free-stream turbulence intensities for zero
pressure gradient and adverse pressure gradients are about 1 %
and 1.5 %, respectively. The motor is capable of free-stream
velocities ranging from 2.5 m/s to 25 m/s.
