Windshear, Inc. Wind Tunnel - 180-MPH Rolling-Road Wind Tunnel - Services


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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 = 75°F	Air temperature can be at 75°F 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	-1°F DT SP +1°F	Average over a 300 second time period
Temperature Stability	T 1°F, (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