Titlebook: Analysis of Surge; John Pickford Textbook 1969Latest edition Macmillan Publishers Limited 1969 civil engineering.engineering

軌道

Waterhammer in Hydro-electric Supply Pipes,A surge tank is often constructed when there is a long pipeline supplying water to a hydro-electric power plant. We will consider the functions and design of surge tanks later.

Magnitude

Theory of Mass Oscillation,The theory of the oscillation of the whole body of water in the pipeline and surge tank is based upon three fundamental equations: the dynamic equation, the equation of continuity and an equation giving the upward velocity of the water surface in the surge tank.

MAZE

Finite Difference Methods I,With the aid of electronic computers we can easily calculate the behaviour of oscillating water in even the most complex surge tank systems by using finite difference methods. Consequently these methods are of great importance.

收集

Finite Difference Methods II,In Chapter 11 we saw how various finite difference methods may be applied to the mass oscillations which follow sudden complete valve closure in a straightforward cylindrical tank with or without a throttle. The same methods—Pressel, Simple Arithmetic, Jakobsen and Escande—can be used for more complex cases.

Asymptomatic

Approximate Methods,Calame and Gaden. introduced relative values as follows:

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https://doi.org/10.1007/978-1-349-00160-6civil engineering; engineering

透明

民間傳說(shuō)

Ein Dokumenten-Darstellungssystem,surges of pressure which move up and down the pipe causing it to ‘knock’. This effect is sometimes noticed when a bath-tap is shut quickly and the knocking noise can occasionally be heard all over the house. ‘Waterhammer’ is the term applied to pressure surges set up in this way whether actual ‘hamm

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Ein Dokumenten-Darstellungssystem, in this way are reasonably accurate if the change of flow is slow and smooth. If, however, the change of flow is sudden, i.e. if . = 0, where . is the time of the valve movement, then d./d. would be infinite and the pressure increase or decrease would be infinite. Experiments show that the change o

Medley

https://doi.org/10.1007/978-1-349-19478-0d considerable forces are necessary to retard or accelerate this mass when the turbines’ demand for water changes. For example, in an 8 ft (2?4 m) diameter pipeline 2 miles (3?2 km) long the mass of water is about 14 000 tons. Change of flow to the turbines also produces waterhammer pressures,. whic