SUBSONIC WIND TUNNEL, Downstream Fan
GENERAL DESCRIPTION
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.
TYPICAL EXPERIMENTS
- 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.
TECHNICAL DATA
| Fan : |
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Diameter |
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500 mm. |
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Impeller |
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Single stage, aerofoil aluminum blade. |
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| Contraction area ratio |
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7:1. |
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| Air velocity control |
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Inverter. |
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| Test Section |
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300 mm x 300 mm x 600 mm long, transparent on three sides. |
| Maximum air velocity |
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Over 30 m/s. |
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| Measuring instruments |
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Water manometer |
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Twin type. |
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Wind velocity |
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Multiple
taps contraction section differential pressure with velocity
calibration graph (to be used with inclined water manometer above). |
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Lift and drag |
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Two component balance for measurement of lift and drag. |
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| Power supply |
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380 V 3 Ph 50 Hz. Other power supply is available on request. |
Motesta Instruments is one of India's most trusted Civil & Mechanical Engineering Lab Equipment Manufacturers for bulk tender supply of SUBSONIC WIND TUNNEL, Downstream Fan. We deliver against Ministry of Education tenders, World Bank funded projects, ITI/Polytechnic supply contracts and turnkey lab setup orders for Engineering Colleges and Universities worldwide.
For tender quotations on SUBSONIC WIND TUNNEL, Downstream Fan (Code: Civil-MCE-0123), our tender desk provides:
- Detailed Technical Specifications matched line-by-line to your tender BOQ
- OEM Authorization Letters and ISO/CE compliance certificates
- EMD & Bank Guarantee support documentation
- Custom branding on labels & control panels for institute identity
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- Multi-language documentation (English, French, Spanish, Arabic on request)
- Container loading photos and pre-shipment inspection reports
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On-site installation, calibration, commissioning and acceptance testing performed by our trained engineers (subject to order value & geography).
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