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Engine
Research Building (ERB):
Flow Physics Facilities - CW-13
20- by 30-inch Low Speed Wind Tunnel
CW-13
Facility Description
This test rig is self-contained and does not require central air
services. The tunnel is used to study flow separation and its control
over various model shapes, and to investigate 2-D shear layer flow
fields. The tunnel draws air through a large rectangular bellmouth
connected to an 80-in.-long test section. Downstream of the test
section is a variable-speed, 10-hp motor that drives the air through
the tunnel. The test section velocity can be varied from 0 to 20
m/s by controlling the speed of the tunnel drive motor or by separating
the fan duct from the test section and allowing some leakage flow
into the fan duct.
CW-13
Special Features
The test section floor has a slot down the middle to allow insertion
of probes. One wall and the roof of the test section is made of
Plexiglas to allow flow visualization consisting of a smoke wire
used in conjunction with high-speed photography. A 20-in.-long spacer
section upstream of the test section has bearings mounted in the
walls to allow installation of airfoils.
CW-13
Facility Capabilities |
| Parameter |
Operating Values |
| Test
section size |
20
by 30 in. |
| Test
section velocity |
0
to 20 m/s |
| Drive
motor |
10
hp, variable speed |
| CW-13 System Instrumentation |
| System |
Number and Type |
| ESP |
16 10 inch of Water Column
Barometric Ref |
| Escort |
No |
| Laser |
PIV (Particle Image Velocimetry)
Rayleigh Scattering |
| Other Information |
National Instruments LabVIEW
Hot Wire
Automated Pressure Probe System |
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