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Mechanics of Fluids cussons
TECHNOLOGY
P3260 SUBSONIC OPEN CIRCUIT WIND TUNNEL
1 Issue 3 [email protected] / www.cussons.co.uk
EXPERIMENTAL CAPABILITY
Investigation of the development of the Boundary Layer
on a flat plate by measurement of the total head
distribution.
Measurement of pressure distribution around an aerofoil
at various angles of attack.
Measurement of pressure distribution around a cylinder.
Measurement of lift and drag on an aerofoil with leading
edge slot and trailing edge flap.
Velocity and pressure distribution measurements using a
Pitot static tube and yaw probe.
Measurement of drag for a selection of models of
different shapes but common equatorial diameter.
Calibration of the Wind Tunnel velocity indicator using a
Pitot static tube and inclined manometer.
FEATURES
Open circuit wind tunnel ideal for universities-classrooms
and research.
Constructed mainly in structural steel, and supported by
a tubular steel framework.
Test section made of clear acrylic, giving full visibility of
the testing area.
3 component balance for lift force, drag force and
pitching moment measurement.
Aluminium honeycomb flow straightener.
Control Panel and Data logging.
Flow cross section 304 mm x 304 mm (width x height.
Downstream air velocity controlled by an axial flow fan.
INTRODUCTION
The P3260 Sub Sonic Open Circuit Wind Tunnel is simple and
safe in operation. It is supplied as a complete self-contained
facility mounted on castors for ease of movement. Main
equipment comprises the tunnel with a three-component
balance system (lift, drag and pitching moment) and an air
speed indicator.
Air enters the test section through a carefully designed
contraction followed by an aluminum honeycomb flow
straightener designed to ensure that the flow is steady in
both magnitude and direction and has a flat transverse
velocity profile. A low angle diffuser at the outlet end
contributes to flow stability in the test section. An axial flow
fan is located at the outlet of the diffuser section.
One number of floor mount 3 component balance for lift
force, drag force and pitching moment measurement is
installed in the test section.
Lift force: 0 to 100 N, sensitivity ±0.01 N
Drag Force: 0 to 50 N, sensitivity ±0.01 N
Pitching Moment: 0 to 2.4 Nm, sensitivity ±0.001 Nm
24 bit analogue to digital conversion of 3 strain gauge
load cells for greater accuracy at low forces.
Forces and moment data are digitally shown on LCD
graphic display screen and are able to transfer to
computer.
Adjustment of pitch angle of models can be made with
the tunnel in operation.
The accuracy of the tunnel and its instrumentation make
it suitable for undergraduate and simple research work.
Mechanics of Fluids cussons
TECHNOLOGY
P3260 SUBSONIC OPEN CIRCUIT WIND TUNNEL
2 Issue 3 [email protected] / www.cussons.co.uk
INSTRUMENTATION
1. One number of floor mount 3 component balance for lift
force, drag force and pitching moment measurement.
Lift force: 0 to 100 N, sensitivity ±0.01 N
Drag Force: 0 to 50 N, sensitivity ±0.01 N
Pitching Moment: 0 to 2.4 Nm, sensitivity ±0.001 Nm
24 bit analogue to digital conversion of 3 strain gauge
load cells for greater accuracy at low forces.
Forces and moment data are digitally shown on LCD
graphic display screen and are able to transfer to
computer.
Adjustment of pitch angle of models can be made with the
tunnel in operation.
2. One Pitot-static probe and one yaw probe.
3. One number of Inclinable Multitube Manometer (20
tubes). This is an inclinable manometer board equipped with
20 tubes, acrylic manifold and a reservoir mounted on a
vertical rod such that the position of the datum manometer
tube levels may be adjusted to convenient heights before
commencing experiments. Scale length is 370mm
accommodating measurement of pressure up to 290mm
water gauge.
4. One set of 2 D manual transverse mechanism for pitot-
static probe and yaw probe.
5. One number of Pitot-static probe with integral
thermocouple and accompanied digital micro manometer
for air flow speed measurement inside the test section
Velocity Range: 1.7 to 90 m/s
Pressure Range: -0.995 to 4.977 kPa (-4 to 20 in H2O)
Accuracy : ±0.22% of Full Scale
Digital Display of pressure and velocity
6. LCD graphic display with key pad HMI (Human Machine
Interface) is used for data acquisition of air flow speed and
air temperature, forces and moment of 3 component
balance, 2 channels pressure from two pressure transducers
(± 5 inch H2O). All All acquired data are shown on the LCD
graphic display.
To reduce the fan discharge sound power level, an acoustic diffuser/silencer is incorporated. The diffuser also serves to exit velocity of air from the system.
Mechanics of Fluids cussons
TECHNOLOGY
P3260 SUBSONIC OPEN CIRCUIT WIND TUNNEL
3 Issue 3 [email protected] / www.cussons.co.uk
Head Office
Cussons Technology Limited
102 Great Clowes Street,
Manchester.
M7 1RH England
Tel: + (44)161 833 0036
Fax: + (44)161 834 4688
E-mail: [email protected]
Explore our website!
www.cussons.co.uk
The company may alter specifications as its discretion and without
notice, in line with its policy of continuous development
TECHNICAL SPECIFICATIONS
380-415 V A/C, 3f, 50 Hz, 10 kW
INSTALLATION REQUIREMENTS
Wind Speed 2.5 to 45 m/s
Test Section 304 mm x 304 mm (width x height)
Test Section Length 600 mm
Contraction Ratio 7:1
Walls of Test Section Made of transparent Acrylic
Support Structure A strong steel frame including working surface and fitted casters for easy movement
Driving Motor 7.5 kW with stepless control of air speed
Manual User Instruction Manual
Overall Dimensions Length 5 m, width 1.5 metre, height 1.5 metre
Figure. Visualization of Stream Lines
Mechanics of Fluids cussons
TECHNOLOGY
P3260 SUBSONIC OPEN CIRCUIT WIND TUNNEL
4 Issue 3 [email protected] / www.cussons.co.uk
OPTIONAL COMPONENTS
P3261 Flat Plate and Probe (Boundary Layer Mode)
The flat plate consists of an aerodynamically smooth surface
200mm wide and 302mm long with the leading edge
carefully profiled to prevent separation of the boundary
layer along the length of the upper test surface.
The plate is mounted horizontally in the tunnel across its full
width. Traverses of the total head distribution at five separate
positions along the length of the plate are made with a
capillary bore, stainless steel probe which is mounted on an
adjustable micrometer head.
The development of the boundary layer may then be
reconstructed graphically from total head profiles in a
vertical plane at each of the five positions. These
measurements of total head are made by connecting
plastic tubing from the probe to the multi tube manometer.
P3262 Multi Tube Manometer
This is an inclinable manometer board equipped with 20
tubes, acrylic manifold and a reservoir mounted on a
vertical rod such that the position of the datum manometer
tube levels may be adjusted to convenient heights before
commencing the experiments.
Inclinable to ratios 1:1, 1:2, 1:5, 1:10.
The scale length is 370mm accommodating measurement of
pressure up to 290mm of water gauge.
P3263 Pressure Wing, Cylinder and Wake Survey Rake
The wing profile is based on the NACA 0015 aerofoil section
with chord length of 100mm. Twenty pressure tappings, all
perfectly flush with the wing surface are distributed around
the profile and fitted with flexible tube designed to be
connected to the multi tube manometer. All the tubes are
housed inside the wing to avoid interference with the air
flow.
The wing position can be adjusted and one of the two end
plates is graduated so that the angle of attack can be read
directly. The wing is also fitted with an acrylic visualisation
plate on which a graphite/kerosene mixture can be used to
show the lines of flow.
An eighteen tube wake survey rake is provided together with
a 25mm diameter cylinder so that its wake may be
compared with that of the aerofoil.
P3261 Flat Plate and Probe
P3262 Multi Tube Manometer
P3263 Pressure Wing
Mechanics of Fluids cussons
TECHNOLOGY
P3260 SUBSONIC OPEN CIRCUIT WIND TUNNEL
5 Issue 3 [email protected] / www.cussons.co.uk
3264 Aerofoil with Slot & Flap
The aerofoil, accurately machined to NACA 0015 profile, is
equipped with an adjustable leading edge slot and trailing
edge flap. It has a 63mm chord and a 250mm span. The flap
is adjustable in angular deflection and in clearance from the
aerofoil. Experimental results such as lift curve slope
(corrected for aspect ratio), maximum lift and maximum
drag may be checked against NACA data (NACA details
not supplied).
P3265 Pitot Static Tube
This item is of 4mm diameter stainless steel tube with a 2D
Traverse mechanism to facilitate 2D traverse across the
working section. It is of Prandtl design and may be used with
negligible correction up to angles of yaw of at least five
degrees. As with the yaw probe, 002-17, this instrument is
designed to be used in conjunction with other models where
velocity and pressure distributions are of interest. The pressure
transducer (± 5 inch H2O) used to monitor the pressure
readings.
In the picture the pitot static tube is installed on the 2D
Traverse Mechanism which is supplied with the FM002 Wind
P3266 Yaw Probe
This item is of 6mm diameter stainless steel tube with a 2D
Traverse mechanism to facilitate full traverse across the
working section. It is of the three hole type with centre hole
for total pressure determination.
It is provided with an aligning pointer with set screw to permit
calibration in the wind tunnel. The pressure transducer is used
to monitor the pressure readings.
P3267 Drag Models
Five models, designed to be mounted in the three
component balance and all of the same equatorial
diameter, are provided:
1. Sphere.
2. Semi hemisphere, convex to airflow direction.
3. Semi hemisphere, concave to airflow direction.
4. Flat plate.
5. Semi cylinder.
3264 Aerofoil with Slot & Flap
Yaw Probe P3265 Pitot Static Tube
Mechanics of Fluids cussons
TECHNOLOGY
P3260 SUBSONIC OPEN CIRCUIT WIND TUNNEL
6 Issue 3 [email protected] / www.cussons.co.uk
P3268 Pressure Cylinder
The acrylic cylinder of 60mm diameter is provided with 19
equi-spaced tapping points around half of the
circumference, i.e. at ten degree intervals between 0° and
180° inclusive.
The model is designed to be mounted vertically and pressure
tapping points taken through the cylinder are connected to
a series of flexible tubes suitable for the multi tube
manometer.
The cylinder can be rotated through 180° if it is required to
plot the pressure distribution over the whole circumference.
P3269 Aircraft Model
P3270 Car Model
P3265 Pitot Static Tube
Head Office
Cussons Technology Limited
102 Great Clowes Street,
Manchester.
M7 1RH England
Tel: + (44)161 833 0036
Fax: + (44)161 834 4688
E-mail: [email protected]
Explore our website!
www.cussons.co.uk
The company may alter specifications as its discretion and without
notice, in line with its policy of continuous development