Pressure transient (water hammer) analysis in water transportation system

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Pressure transient (water hammer) analysis in water transportation system


Author: Yap, Tao
Title: Pressure transient (water hammer) analysis in water transportation system
Degree: M.Sc.
Year: 1998
Subject: Water hammer
Hydraulic transients
Pipelines -- Hydrodynamics
Water-pipes -- Hydrodynamics
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Dept. of Mechanical Engineering
Pages: xi, 146, [53] leaves : ill. ; 30 cm
Language: English
Abstract: The effect of the pressure transient and propagation of pressure waves in water pipelines has come to be known by the rather homely name of "water hammer". Water hammer will take place either in a gravity pipeline when the valve at the end of the pipeline is shut off rapidly or in the pressurized pipeline when pump is stopped suddenly, causing the pressure in the pipeline to increase or decrease. Water hammer is serious in the long distance water transportation system, and it causes significant noise generation and even pipeline or equipment damage. From the experience of senior engineers, some serious water hammer effect may cause damping of pipelines and even explosion. In this respect, an early prediction on the level of water hammer effect, means the level of pressure fluctuation, is valuable to prevent the damage of the system and the interruption of services. In this investigation, theories of the pressure transient in pipework were extensively reviewed and a "Window" based computer program was developed. This dissertation describes a computer program which can simulate the pressure transient phenomena occurring in a complex Water Transportation System, when the power supply to the pump motor is suddenly cut off. Moreover, the application of the software shows that the program developed is reliable and user-friendly for the practical design and improvement of the Water Transportation System.

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