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One of the first to successfully investigate the water hammer problem was the Italian engineer Lorenzo Allievi. Water hammer can be analyzed by two different approaches— rigid column theory , which ignores compressibility of the fluid and elasticity of the walls of the pipe, or by a full analysis that includes elasticity.
In August 1902, when maintenance was being carried out on the hydroelectrical power plant of Papigno , the closure of a water pipe caused its explosion and great damage to the plant. Allievi investigated the problem immediately thereafter and published his fundamental study on the water hammer problem the same year. He continued to study this ...
The device uses the water hammer effect to develop pressure that allows a portion of the input water that powers the pump to be lifted to a point higher than where the water originally started. The hydraulic ram is sometimes used in remote areas, where there is both a source of low-head hydropower and a need for pumping water to a destination ...
Hydropneumatic water hammer preventers are chambers of sufficient volume to allow an extension of time in which a given flow may be accelerated or decelerated without sudden large change in pressure. See also expansion tank. When shock waves of an incompressible fluid within a piping system exist, especially at a high velocity, there is a high ...
The magnitude of the Water hammer pulse is proportional to the velocity of the flow. Also, after the pipe is of a certain length the magnitude of the pulse remains the same. So it has little to do with the kinetic energy of the flow. I will elucidate the derivation when I get to a textbook. Donebythesecondlaw 19:34, 10 April 2008 (UTC)
Water hammer, a pressure surge caused by a fluid suddenly changing velocity Hydrostatic shock , a hypothesized phenomenon by which pressure waves from a high-speed projectile entering a victim cause injury away from an entry wound
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Water hammer estimated at 10,000 pounds per square inch (69,000 kPa) struck the top of the reactor vessel propelling the entire reactor vessel upwards over 9 feet (2.7 m) in the air. One operator who had been standing on top of the vessel was killed when a shield plug impaled him and lodged in the ceiling.
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