Additional information
| Brand | Essom |
|---|
Subsonic Wind Tunnel: Upstream Fan (High Speed)
This subsonic 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 straightener, 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 display 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.
Instruction manual is also included.
TYPICAL EXPERIMENTS
- Pressure and velocity measurement.
- Estimation of drag coefficients of various bodies, e.g. sphere, hemisphere, disc, plate, streamlined shape etc.
- Estimation of drag lift and pitching coefficients of an aerofoil.
- Pressure distribution around an aerofoil or a cylinder.
- Effects of instability of a “flutter Wing”.
- Investigation of boundary layer at a flat plate by measuring total head distribution.
- Stream lines visualization using a smoke generator.
- Wakes behind models.
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, transparent on three sides |
| Maximum air velocity | Over 60 m/s |
| 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) |
| – Sensors with digital display | |
| – Lift and drag | Two component balance with model holder for measurement of lift and drag |
| Software for data display and analysis by computer (separately supplied). | |
| Power supply | 380 V, 3 Ph, 50 Hz. Other power supply is available on request. |
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Instruction manual is also included.
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Instruction manual is also included.
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- Filter bag
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