PASCO ME-8598 Venturi Apparatus - Manual (Page 6)

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V e n t u r i A p p a r a t u s 0 1 2 -0 9 4 8 6 B E x p e r i m e n t
6
straight, the pressure at Point 2 would be the average of P
1
and P
3
. Calculate this
theoretical pressure:
(eq. 3)
6. Use the measured flow rate, R, and Equation 1 to calculate the fluid speed in the
wide parts of the tube (
υ
0
), and the speed in the venturi constriction (
υ).
7. Use these values of
υ
0
and
υ and Equation 2 to calculate the theoretical pressure
(P) in the venturi constriction. Compare this to the actual pressure measured by
the sensor (P
2
).
Further Analysis
Repeat the analysis above for Points 2, 3, and 4.
Clean-up
1. Allow the water reservoir to run empty. Tilt the apparatus to empty water from it.
2. With the apparatus empty of water, disconnect the pressure tubes from the sensor.
(Leave the tubes connected to the underside of the apparatus.)
3. Remove the top plate from the apparatus. Allow the apparatus and tubing to dry
completely.
Storage
Store the apparatus with the top plate loose to avoid permanently deforming the seal.
P
0
P
1
P
2
+
2
------------------ =