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Aerodynamics Facility
The AAR's 5500 square foot aerodynamics
facility houses one of the only Wind Tunnels on the West Coast and one of
the only water tow tanks of its kind anywhere. The Wind Tunnel was first
designed and supplied by the AIOLOS Engineering Corporation in 1993 and has
since undergone many modifications starting in 2000 including an upgrade to the
data acquisition system, the boundary suction device, and the model
positioning pitch mechanism. It features a 4.5 ft. x 9 ft. long moving
ground plane, a 3 ft x 5 ft. test section area, a 30% open slotted wall, and
a 100 mph maximum air speed capacity. The Water Tunnel or Tow Tank is 50
feet long and features a tow mechanism with a high speed digital camera able
to record flow characteristics through different color dye emissions from
underneath and around the model as it travels through the tank.
Wind Tunnel - originally built by the AIOLOS Engineering
Corporation
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30% open slotted wall test section open return tunnel w/
contraction ratio: 4.1 to 1
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Test section: 35 inch high x 60 inch wide x 123 inch long
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Nozzle’s cross sectional area: 35 inch high x 60 inch wide
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Re-Entry flaps: Adjustable
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Fan power: 74.6 kW (100 Hp)
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Maximum air speed: 108 mph (48.2 m/s)
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Air speed accuracy: +/- 0.06%
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Air speed uniformity: +/- 0.13%
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Turbulence level: 0.30%
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Boundary layer profile: 0.999 average velocity ratio over
the first inch above the belt
Rolling road
Maximum belt speed: 105 mph
Working area: 54 inch wide x 108-inch nom. Long
Pacific Instruments Model 6000 Data Acquisition & Control
System
One 8-channel Thermocouple /IES Amplifier
Two 8 channel Strain gauge transducer Digitizer
One 16 Digital input and 16 Digital output
Main balance: Micro Craft, MC-5.0-6.0-A Six component internal
balance
Sub-Balance: Advanced Mechanical Technology, Inc. MC3A-250 Six
component internal balance
Water Tunnel / Tow tank
2 ft. high x 3 ft. wide x 50 ft. long Clear Acrylic Rectangular
Basin
Model and Camera tractor speed @ 1 to 5 feet per second
BALDOR 10 HP Vector Motor and 10 HP 460 VAC Drive Controller
High Speed Digital Camera system, Model o2s NAC Inc.
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Frame Rate: 200, 300 and 400 pps
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Shutter Speed: Off, 1/500, 1/1000, 1/2000, 1/5000 and
1/10000 sec.
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Lens: Fujinon-TV-Z, Fiji Photo Optical Co.
Flow Visualization through Dye Emission
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