Chapter 3 – What Causes Surge?
Surge Analysis and the Wave Plan Method
Supplementary Material: Example Problems and Solutions
Chapter 3 – Problem 3.2
3.2 What is be the horizontal distance of the hydrant flow jet (of the same 10,000 lpm flowrate) if the outlet size is reduced to 50 mm (2 in)?
Solution:
Velocity of the jet exiting the 50 mm outlet:
Vx = {10000/1000/60}/{(π/4)*(50/1000)^2} = 84.88 m/s
Velocity in the vertical direction Vy = 0
Vertical distance y = 0.75m, Y = Vy t + (1/2) g t2 è travel time t = 0.391s
Projectile horizontal distance X = Vx t = 33.19 m (107.5 ft)
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