
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 a wire mesh screen and a flow straightener. A high contraction ratio section ensures 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 on a frame with adjustable footings for table top mounting.
Instruction manual is also included.
- 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.
- Investigation of boundary layer at a flat plate by measuring total head distribution.
- Stream lines visualization using a smoke generator.
- Wakes behind models.
Fan: | |
- Diameter | 300 mm |
- Impeller | Single stage, aerofoil blade |
Contraction area ratio | 9:1 |
Test section | 150 mm x 150 mm x 450 mm long, transparent on three sides |
Maximum air velocity | Over 30 m/s |
Measuring instruments | |
- Water manometer | Twin type |
- Wind velocity | Multiple taps contraction section differential pressure with 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 |
Power supply | 220 V, 1 Ph, 50 Hz. Other power supply is available on request. |
OPTIONAL MEASURING ACCESSORIES | |
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Part No. | Part Name |
MP 100-011M | Multi port differential pressure digital display instead of inclined water manometer. |
MP 315-003A | Three component balance with digital display and model holder for measurement of lift drag and pitching instead of two component balance. |
MP 330-110 | Anemometer for velocity measurement telescopic handle |
MP 330-111 | Angle digital display for model angular position. It is to be attached to two or three component balance. |
MP 330-114 | Multitube inclined water manometer |
MP 330-114D | 16 points differential pressure sensor with sequential readings (To be used with computer) |
MP 315-121 | Pitot-static probe stainless steel |
MP 315-122 | Yaw probe three tube type with clamp |
MP 315-125 | Wake survey rake |
MP 330-130 | Smoke generator set |
Additional Smoke fluid |
OPTIONAL MODELS FOR LIFT AND DRAG | |
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Part No. | Part Name |
Models for a study of lift drag and pitching include: | |
MP 315-011 | Sphere plastics |
MP 315-012 | Hemisphere plastics |
MP 315-013 | Circular disc |
MP 315-014 | Circular ring |
MP 315-015 | Square plate |
MP 315-016 | Vane |
MP 315-017 | Cylinder plastics |
MP 315-018 | Streamlined shape plastics |
MP 315-019 | Aerofoil aluminium |
MP 315-019L | Aerofoil long aluminium |
MP 315-030 | Aerofoil with slot and flap aluminium |
MP 315-030L | Aerofoil with slot and flap long |
OPTIONAL MODELS AND ACCESSROIES FOR INDIVIDUAL STUDY | |
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Part No. | Part Name |
MP 315-053 | Pressure wing aluminium |
MP 315-055 | Pressure cylinder plastics: |
MP 315-057 | Boundary layer plate with probe |
MP 315-150 |
Computer Interface Sensors with computer interface unit for key data acquisition instead of analog data measuring instruments. This consists of computer computer interface unit pressure sensor rotary encoder and multiport differential pressure sensors for:
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Net (unassembled) Shipping Dimensions WxLxH | 55 x 290 x 76 cm. |
Net Weight | Approx. 130 kg. |