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Windshear Inc. Wind Tunnel Specifications

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Maximum Airspeed V max 180 mph For full-scale vehicles at 0 yaw (A=27 ft2, CD = 0.3, L = 18 ft)
Maximum Air Temperature T max = 75F Air temperature can be at 75F at all tunnel air speeds (ASHRAE 1% day)
Airspeed Set Point -0.25 mph V SP +0.25 mph Average over a 300 second time period
Airspeed Stability V 0.30 mph, (1σ) Standard deviation over a 300 second time period
Temperature Set Point -1F DT SP +1F Average over a 300 second time period
Temperature Stability T 1F, (1σ) Standard deviation over a 300 second time period
Total Pressure Uniformity PT/q  0.30%, (1σ) Standard deviation of the measurements within the test plane
Static Pressure Uniformity PS/q  0.60%, (1σ) Standard deviation of the measurements within the test plane
Flow Angularity Uniformity & 0.25 (1σ) Standard deviation of the measurements within the test plane
Longitudinal Turbulence Intensity u/U  0.40% Average of measurements within the test core; frequency range of 10 to 10,000 Hz
Speed Deviation in vicinity immediately above the RR belt (Boundary Layer) │U-U∞│ ∕ U∞  4% for 0-2 above belt
│U-U∞│ ∕ U∞  0.5% for 2-10 above belt
Above belt on the belt centerline at the test plane
Acceleration / Deceleration Rate V Rate 30 seconds

0 to 180 mph in 30 sec
180 to fan stop in 30 sec

 

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