The wind tunnel is an open circuit down stream fan type designed for studying the subsonic aerodynamics. It is to be used with optional accessories and models below.
The air enters the tunnel via an entrance flare. A flow straightener, three wire mesh screens, and a high contraction ratio section ensure uniform velocity across the transparent test section. Downstream of the working section is a low angle diffuser which terminates at the tunnel fan. The diffuser and contraction sections have a high quality internal finish to minimize the boundary layer effects. The fan impeller blades are of an aerofoil design cast aluminum to ensure maximum aerodynamic efficiency and minimum turbulence. Fan speed is adjustable by an inverter.
Four equally spaced static pressure taps are connected to a manifold to minimize effects from a model. Air speed is indicated by an inclined manometer and a calibration graph. Models are mounted on two components balance 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 tunnel is mounted on a steel table on wheels.
- Pressure and velocity measurement.
- Estimation of drag coefficients of various bodies, eg. sphere, hemisphere, disc, streamlined shape etc.
- Estimation of drag and lift 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.
|-||Impeller||:||Single stage, aerofoil aluminum blade.|
|Contraction area ratio||:||7:1.|
|Air velocity control||:||Inverter.|
|Test Section||:||300 mm x 300 mm x 600 mm long, transparent on three sides.|
|Maximum air velocity||:||Over 30 m/s.|
|-||Water manometer||:||Twin type.|
|-||Wind velocity||:||Multiple taps contraction section differential pressure with 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.|
|•||MP 330-003||Three component balance for measurement of lift drag and pitching instead of two component balance.|
|•||MP 330-005||Velocity (differential pressure) digital display.|
|•||MP 330-110||Anemometer for velocity measurement.|
|•||MP 330-111||Angle digital display for model angular position.|
|•||MP 330-114||Multitube inclined water manometer.|
|•||MP 330-114D||16 point differential pressure sensor with sequential readings instead of multitube inclined water manometer.|
|•||MP 330-121||Pitot-static probe stainless steel.|
|•||MP 330-122||Yaw probe three tube type with clamp.|
|•||MP 330-125||Wake survey rake.|
|•||MP 330-130||Smoke generator set.|
Models for a study of lift drag and pitching include :
|•||MP 330-013||Circular disc|
|•||MP 330-014||Circular ring|
|•||MP 330-015||Square plate|
|•||MP 330-018||Streamlined shape|
|•||MP 330-025||Model air plane|
|•||MP 330-026||Model automobile|
|•||MP 330-030||Aerofoil with slot and flap|
OPTIONAL MODELS AND ACCESSORIES FOR INDIVIDUAL STUDY
|•||MP 330-050||Flutter wing|
|•||MP 330-053||Pressure wing|
|•||MP 330-055||Pressure cylinder|
|•||MP 330-057||Boundary layer plate with probe.|
|•||MP 330-150||Computer Interface|
|This package consists of computer interface unit software and required accessories for:|
|• Control of wind velocity.|
|• Display of:|
|- Wind velocity lift drag pitching moment and angle of attack.|
|- Coefficient of lift drag and pitching moment.|
|- Pressure distribution.|
|Net (unpacked) shipping dimensions WxLxH||:||140 x 440 x 155 cm|
|Net weight||:||Approx. 560 kg|