MP 330D Page 1 of 3

ESSOM CO., LTD. 508 Soi Taksin 22/1 Taksin Rd. Bukkalo Thonburi Bangkok 10600 Thailand Tel. +66 2476 0034 Fax. +66 2476 1500 E-mail : essom@essom.com,http://www.essom.com We reserve the right to change specifications without prior notice

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MP 330D 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.

TECHNICAL DATA .Fan : - Diameter : 500 mm. - Impeller : Single stage, aerofoil aluminum blade. .Motor : 2.2 kW. .Air velocity control : Inverter. .Contraction area ratio : 7:1. .Test Section : 300 mm x 300 mm x 600 mm long, transparent on three sides. .Maximum air velocity : Over 30 m/s. .Measuring instruments

- Water manometer : Twin type., 0-450 mm x 1 mm graduation, multiple slope 1:10, 1:5, 1:2 and 1:1. - Wind velocity : Multiple taps contraction section differential pressure with velocity calibration graph (to be

used with inclined water manometer above). - Sensors with digital display

o Lift and drag : Two component balance with model holder for measurement of lift and drag. - Lift ±10N, Drag 10N. - Angular scale, ±180 degrees. .Power supply : 220 V 1 Ph 50 Hz. Other power supply is available on request.

EXPERIMENT CAPABILITIES . 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.

MP 330D Page 2 of 3

ESSOM CO., LTD. 508 Soi Taksin 22/1 Taksin Rd. Bukkalo Thonburi Bangkok 10600 Thailand Tel. +66 2476 0034 Fax. +66 2476 1500 E-mail : essom@essom.com,http://www.essom.com We reserve the right to change specifications without prior notice

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OPTIONAL MEASURING ACCESSORIES . MP 100-011M Multi port differential pressure digital display instead of inclined water manometer. .MP 330-003 Three component balance with digital display and model holder for measurement of lift, drag, and pitching moment instead of two component balance.

- Lift ±10N - Drag 10N - Pitching ±1Nm - Angular scale, ±180 degrees. .MP 330-005 Velocity (differential pressure) digital display. .MP 330-007 Exhaust silencer. .MP 330-110 Anemometer for velocity measurement. - Range : Upto 40 m/s. .MP 330-111 Angle digital display for model angular position. . MP 330-114 Water manometer, inclined, multitube, air pressure : 16 tubes x 450 mm x 1 mm graduation. : multiple slope, 1:10, 1:5, 1:2 and 1:1. .MP 330-114D 16 point differential pressure sensor with sequential readings instead of MP330-114 Multitube inclined water

manometer (To be used with computer) .MP 330-121 Pitot-static probe, stainless steel : 4 mm diameter x 300 mm long .MP 330-122 Yaw probe, three tube type with clamp : Stainless steel tubes, 1 mm. To be used with MP 330-114 (separately supplied). .MP 330-125 Wake survey rake : 16 stainless steel tubes. To be used MP 330-114 (separately supplied). .MP 330-130 Smoke generator, set : The set includes smoke generator, smoke fluid, smoke chamber

and stream line distributors, light and 4 models. .Additional smoke fluid : 4 l. OPTIONAL MODELS FOR LIFT AND DRAG Models for a study of lift, drag and pitching include : . MP 330-011 Sphere, plastics : 80 mm diameter. . MP 330-012 Hemisphere, plastics : 80 mm diameter, convex or concave. . MP 330-013 Circular disc : 80 mm diameter. . MP 330-014 Circular ring : 80 and 40 mm diameter. . MP 330-015 Square plate : 71 mm x 71 mm. . MP 330-016 Vane : 50 mm wide x 100 mm long. . MP 330-017 Cylinder, plastics : 50 mm diameter x 100 mm long. . MP 330-018 Streamlined shape, plastics : 50 mm diameter x 200 mm long. . MP 330-019 Aerofoil, aluminium : NACA0015 profile, 100 mm chord x 100 mm long . MP 330-019L Aerofoil, long, aluminium : NACA0015 profile, 100 mm chord x 290 mm long . MP 330-025 Model air plane, plastics : Approx 100 mm wing span x 150 mm. long . MP 330-026 Model automobile, plastics : Length approx 100 mm . MP 330-030 Aerofoil with slot and flap, aluminium : NACA0015 profile, 100 mm chord x 100 mm long and stainless steel . MP 330-030L Aerofoil with slot and flap, long : NACA0015 profile, 100 mm chord x 290 mm long aluminium and stainless steel OPTIONAL MODELS AND ACCESSORIES FOR INDIVIDUAL STUDY . MP 330-050 Flutter wing, aluminium aerofoil : NACA 0015 profile, 100 mm chord x 200 mm long on steel frame. . MP 330-053 Pressure wing, aluminium : NACA0015 profile, 100 mm chord x 290 mm long (To be used with MP 330-114) . MP 330-055 Pressure cylinder, plastics : 50 mm diameter x 290 mm long. (To be used with MP 330-114) . MP 330-057 Boundary layer plate with probe. - Plate : 280 mm wide x 300 mm long. - Capillary bore stainless steel probe, 1 mm diameter mounted on adjustable micrometer. .MP 330-150 Computer Interface This package consists of computer interface unit, and 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.

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ESSOM CO., LTD. 508 Soi Taksin 22/1 Taksin Rd. Bukkalo Thonburi Bangkok 10600 Thailand Tel. +66 2476 0034 Fax. +66 2476 1500 E-mail : essom@essom.com,http://www.essom.com We reserve the right to change specifications without prior notice

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Net (unpacked) shipping dimensions WxLxH : 140 x 440 x 155 cm Net weight : Approx. 560 kg

MP 330-016 MP 330-019 MP 330-018 MP 330-011 MP 330-013 MP 330-017

MP 330-015 MP 330-030 MP 330-014 MP 330-012

MP 330-003

Two component balance with indicators

MP 330-055

MP 330-050

MP 330-057 MP 330-114

MP 330-114D

MP 330-125

MP 330-122

MP 330-053

MP 330-130