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Airflow Measurement Venturi (Differential Pressure)
by senorjp
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I measure the differential pressure of a 12-volt centrifugal blower fan using a 3:1 Venturi and a manometer filled with water.
The red liquid is water with red food colouring. Air flows from the fan across the end of the clear tube on the right, and into a narrower section with 1/3rd the cross-sectional area across the end of the tube on the left side. The venturi effect causes lower pressure in the narrower section. The difference between the height of water on the left side and the heigh
The red liquid is water with red food colouring. Air flows from the fan across the end of the clear tube on the right, and into a narrower section with 1/3rd the cross-sectional area across the end of the tube on the left side. The venturi effect causes lower pressure in the narrower section. The difference between the height of water on the left side and the heigh
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