In mathematical form, v = Q/A, where Q is the volumetric flow rate and A is the cross section area, represents the wind speed.
The CFM rating is the volumetric flow rate, and because the test section is just 1 foot by 1 foot, the flow cross section area is only 1 foot by 2 feet. As a result, you'll have a number expressed in feet per minute. The Bernoulli principle is used to determine the air speed through the test portion. measurement of the airflow's temperature, the dynamic pressure, the static pressure, and (only for compressible flow) the static pressure. Tufts of yarn fastened to the aerodynamic surfaces of a model can be used to estimate the direction of the wind around it.
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