A reservoir discharges through a steel pipeline, which is 910 mm diameter, 2500 m long and has wall thickness 32 mm. Water is flowing along the pipe at a steady mean velocity 2.5 ms!. (a) Calculate the speed of water hammer waves in the pipe. (b) Calculate the rise of pressure which would occur if the flow through the pipe were reduced rapidly to zero due to a failure of the turbine at the downstream end of the pipe. (c) Describe the sequence of events which follows this sudden closure, giving the times and pressure where appropriate, assuming that cavitation does not occur and neglect any other friction losses.

A reservoir discharges through a steel pipeline, which is 910 mm diameter, 2500 m long and has wall thickness 32 mm. Water is flowing along the pipe at a steady mean velocity 2.5 ms!. (a) Calculate the speed of water hammer waves in the pipe. (b) Calculate the rise of pressure which would occur if the flow through the pipe were reduced rapidly to zero due to a failure of the turbine at the downstream end of the pipe. (c) Describe the sequence of events which follows this sudden closure, giving the times and pressure where appropriate, assuming that cavitation does not occur and neglect any other friction losses.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Pressurized pipe flow

A 15-kilometer-long pipe with a pipe diameter of one meter transports water at a speed of one meter per second. The pipe has a friction coefficient of 0.005. Calculate the frictional head loss?

Question

A reservoir discharges through a steel pipeline, which is 910 mm diameter, 2500 m
long and has wall thickness 32 mm. Water is flowing along the pipe at a steady mean
velocity 2.5 ms!.
(a) Calculate the speed of water hammer waves in the pipe.
(b) Calculate the rise of pressure which would occur if the flow through the pipe were
reduced rapidly to zero due to a failure of the turbine at the downstream end of the
pipe.
(c) Describe the sequence of events which follows this sudden closure, giving the
times and pressure where appropriate, assuming that cavitation does not occur and
neglect any other friction losses.

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