Question: A modern venturi nozzle is tested in a laboratory flow with water at 20C. The pipe diameter is 5.5 cm, and the venturi throat diameter

A modern venturi nozzle is tested in a laboratory flow with water at 20°C. The pipe diameter is 5.5 cm, and the venturi throat diameter is 3.5 cm. The flow rate is measured by a weigh tank and the pressure drop by a water-mercury manometer. The mass flow rate and manometer readings are as follows:
m,kg/s: 0.95 1.98 2.99 5.06 8.15
h, mm: 3.7 15.9 36.2 102.4 264.4
Use these data to plot a calibration curve of venturi discharge coefficient versus Reynolds number. Compare with the accepted correlation, Eq. (6.116).

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