Problem 5: A pressurized tank of water has a 10-cm-diameter nozzle at the bottom, where the liquid discharges to the atmosphere. The liquid level is 2.5 m above the outlet and the tank diameter can be assumed to be much larger than the diameter of the discharge nozzle. The air pressure in the space above the liquid is 250 kPa (absolute) while the atmospheric pressure is 100 kPa. Neglecting frictional effects, determine the rate of discharge (kg/sec) of liquid from the tank when the liquid level is 2.5m. Air 250 kPa 25 m 10 cm

Question

1. Is steady flow a good approximation for this problem? Why?
2. What assumption will you use about frictional effects?

Problem 5: A pressurized tank of water has a 10-cm-diameter nozzle at the bottom, where the
liquid discharges to the atmosphere. The liquid level is 2.5 m above the outlet and the tank
diameter can be assumed to be much larger than the diameter of the discharge nozzle. The air
pressure in the space above the liquid is 250 kPa (absolute) while the atmospheric pressure is
100 kPa. Neglecting frictional effects, determine the rate of discharge (kg/sec) of liquid from the
tank when the liquid level is 2.5m.
Air
250 kPa
25 m
10 cm
Expand
Transcribed Image Text

Problem 5: A pressurized tank of water has a 10-cm-diameter nozzle at the bottom, where the liquid discharges to the atmosphere. The liquid level is 2.5 m above the outlet and the tank diameter can be assumed to be much larger than the diameter of the discharge nozzle. The air pressure in the space above the liquid is 250 kPa (absolute) while the atmospheric pressure is 100 kPa. Neglecting frictional effects, determine the rate of discharge (kg/sec) of liquid from the tank when the liquid level is 2.5m. Air 250 kPa 25 m 10 cm

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