Measuring the CFM of a fan
DT wrote:
... One thing you need to know is that velocity
drops to near zero at the walls. The velocity profile across a duct is a
bell curve. The url that Artemus posted has an equation that seems to
take the velocity profile into account.
A bell curve should mean that the average is calculate-able. Artemus'
link uses 90% of peak (center).
Bob
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