Approximate solution to Water Hammer Problem

Steel Penstock Example

Pipe Thickness = 1.0 inch
Modulus of elasticity of steel = 4.32e9 psf
Diameter = 10.00 ft
Length = 3000 ft
Velocity = 10.0 ft/s

Sudden Valve Closure


Velocity of pressure wave = 0 ft/s
Pressure head due to sudden closure = 0 ft
Wave Reflection time = 0 sec

Slow Valve Closure


Time for slow closure = 60.00 sec
Pressure head = 0.00 ft

Reference

Ricketts, Standard Handbook for Civil Engineers, 5th Ed

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Approximate solution to water hammer problem. Input parameters are in Blue. Outputs are in dark brown.