Code: Civil-MCE-0125
SUBSONIC WIND TUNNEL, Upstream Fan.
GENERAL DESCRIPTION
The wind tunnel is an open circuit upstream fan type, designed for studying the subsonic aerodynamics. It is to be used with optional accessories and models below.
A dual an axial flow fans delivers air through a diffuser, aluminum tube flow straigthener, three wire mesh screens and a high contraction ratio section to ensure uniform velocity across the transparent test section. The diffuser and contraction sections have a high quality internal finish to minimize the boundary effects. The fan impeller blades are of an aerofoil design cast aluminum to ensure maximum aerodynamic efficiency and minimum turbulence. The fan speed is adjustable by an inverter.
Four equally spaced static pressure taps are connected to a manifold to minimize effects from a model and air speed is indicated by an inclined manometer and a calibration graph. Models are mounted on two components load cell support with digital diplay for measurement of drag and lift. Model holder can be rotated to allow quick change on the angle of incidence, this angle is indicated on an angular scale.
The wind tunnel is mounted on a steel table on wheels.
TYPICAL EXPERIMENTS
TECHNICAL DATA
Fan : | ||||||||
- | Diameter | : | 630 mm. | |||||
- | Impeller | : | Single stage, aerofoil aluminum blade. | |||||
Contraction area ratio | : | 7:1. | ||||||
Test Section | : | 300 mm x 300 mm x 600 mm long, transparentor on three sides. | ||||||
Maximum air velocity | : | Over 60 m/s. | ||||||
Air velocity control | : | Inverter. | ||||||
Measuring instruments | ||||||||
- | Water manometer | : | Twin type. | |||||
- | Wind velocity | : | Contraction section differential pressure with inclined water manometer and velocity calibration graph (to be used with inclined water manometer above). | |||||
- | Lift and drag | : | Two component balance for measurement of lift and drag. | |||||
Power supply | : | 380 V . 3 Ph 50 Hz. Other power supply is available on request. |