P10. The low throat pressure in a venturi can aspirate fluid upward from the reservoir. Derive an expression for the flow rate, which is just sufficient to bring reservoir fluid into the throat.
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The flow rate through the venturi can be determined using the Bernoulli's equation, which relates the pressure, velocity, and height of a fluid. Show moreā¦
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A necked-down section in a pipe flow, called a venturi, develops a low throat pressure which can aspirate fluid upward from a reservoir, as in Fig. P3.161. Using Bernoulli's equation with no losses, derive an expression for the velocity $V_{1}$ which is just sufficient to bring reservoir fluid into the throat.
Eduard S.
Water at $10^{\circ} \mathrm{C}$ flows steadily through a venturi. The pressure upstream from the throat is $200 \mathrm{kPa}$ (gage). The throat diameter is $50 \mathrm{mm}$; the upstream diameter is $100 \mathrm{mm}$. Fstimate the maximum flow rate this device can handle without cavitation.
A Venturi meter equipped with a differential pressure gage is used to measure the flow rate of water at 15°C ( = 999.1 kg/m3) through a 5-cm-diameter horizontal pipe. The diameter of the Venturi neck is 3 cm, and the measured pressure drop is 5 kPa. Taking the discharge coefficient to be 0.98, determine the volume flow rate of water and the average velocity through the pipe.
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