Industry Applications
In industry, the velocities being measured are often those flowing in ducts and tubing where measurements by an anemometer would be difficult to obtain. In these kinds of measurements, the most practical instrument to use is the pitot tube. The pitot tube can be inserted through a small hole in the duct with the pitot connected to a U-tube water gauge or some other differential pressure gauge (alnor) for determining the velocity inside the ducted wind tunnel. One use of this technique is to determine the amount of cooling that is being delivered to a room.
The fluid flow rate in a duct can then be estimated from:
- Volume flow rate (cubic feet per minute) = duct area (square feet) × velocity (feet per minute)
- Volume flow rate (cubic meters per second) = duct area (square meters) × velocity (meters per second)
In aviation, airspeed is typically measured in knots.
Read more about this topic: Pitot Tube
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