Question 1 of 4 · Bernoulli and Mechanical Energy · Intermediate · About 19 min
Discharge from an elevated inspection reservoir
An open reservoir discharges through a short horizontal exit nozzle of diameter to the atmosphere. The water surface is above the nozzle centreline. All friction and entrance losses may be represented by one loss coefficient based on nozzle exit speed. Neglect reservoir surface velocity and find the nozzle exit speed and volumetric discharge using .
Given
Free surface is 5.00 m above exit
Nozzle exit diameter: 0.0450 m
Total loss coefficient based on exit speed: K=0.80
Gravity: 9.81 m/s²
Find
Exit speed
Volumetric discharge
Assumptions
Both end pressures atmospheric.
Large tank area compared with exit area.
Loss coefficient covers all flow losses.
Worked solution
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