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Hydraucone
A hydraucone is a form of draft tube used with a water turbine, hydro turbine. It has a bell-mouth shape and its salient feature is a flat plate deflector near the mouth. The term ''hydraucone'' was introduced by William M. White, who obtained a U.S. patent for it in 1917. Background White observed that the simplest method of changing the direction of a jet of water was to direct it at a flat plate. The shape of the water jet as it hits the plate was the inspiration for the hydraucone profile. The main purpose of a draft tube is to recover the residual kinetic energy of the water that exits over the turbine. It does this by distributing the water that exits from the turbine uniformly over the larger area of the draft tube exit. This reduces the water velocity and water pressure at the turbine exit. The kinetic energy of the water, which is proportional to the square of the water velocity, is thus transformed into effectively a higher hydraulic head, head across the turbine. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydraucone At Niagara Falls Power Company
A hydraucone is a form of draft tube used with a hydro turbine. It has a bell-mouth shape and its salient feature is a flat plate deflector near the mouth. The term ''hydraucone'' was introduced by William M. White, who obtained a U.S. patent for it in 1917. Background White observed that the simplest method of changing the direction of a jet of water was to direct it at a flat plate. The shape of the water jet as it hits the plate was the inspiration for the hydraucone profile. The main purpose of a draft tube is to recover the residual kinetic energy of the water that exits over the turbine. It does this by distributing the water that exits from the turbine uniformly over the larger area of the draft tube exit. This reduces the water velocity and water pressure at the turbine exit. The kinetic energy of the water, which is proportional to the square of the water velocity, is thus transformed into effectively a higher head across the turbine. The hydraucone draft tube is ve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moody Draft Tube PDF II
Moody may refer to: Places * Moody, Alabama, U.S. * Moody, Indiana, U.S. * Moody, Missouri, U.S. * Moody, Texas, U.S. * Moody County, South Dakota, U.S. * Port Moody, British Columbia, Canada * Hundred of Moody, a cadastral division in South Australia ** Moody, South Australia, a locality ** Moody Railway Station ** Moody Tank Conservation Park, a protected area in South Australia Business * Moody Bible Institute ** Moody Radio ** Moody Broadcasting Network, based in Chicago, USA ** Moody Publishers, based in Chicago, USA * Moody Yachts, a British boatbuilder Other * ''Moody'' (album) * Moody (crater), an impact crater on Mercury * Moody (surname), people and characters with the name * Moody Air Force Base, Lowndes County, USA * Moody chart, used for computing friction losses in pipes * Moody Church, based in Chicago, USA * "Moody", a 1981 song from ESG's ''ESG'' EP * "Moody", a 2006 song from Bitter:Sweet's '' The Mating Game'' See also *Justice Moody (other) * *Moody ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Draft Tube
Draft Tube is a diverging tube fitted at the exit of runner of turbine and used to utilize the kinetic energy available with water at the exit of runner. '. This draft tube at the end of the turbine increases the pressure of the exiting fluid at the expense of its velocity. This means that the turbine can reduce pressure to a higher extent without fear of back flow from the tail race. In an impulse turbine the available head is high and there is no significant effect on the efficiency if the turbine is placed a couple of meters above the tail race. But in the case of reaction turbines, if the net head is low and if the turbine is installed above the tail race, there can be appreciable loss in available pressure head to power the turbine. Also, if the pressure of the fluid in the tail race is higher than at the exit of the turbine, a back flow of liquid into the turbine can result in significant damage. By placing a draft tube (also called a diffuser tube or pipe) at th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Turbine
A water turbine is a rotary machine that converts kinetic energy and potential energy of water into mechanical work. Water turbines were developed in the 19th century and were widely used for industrial power prior to electrical grids. Now, they are mostly used for electric power generation. Water turbines are mostly found in dams to generate electric power from water potential energy. History Water wheels have been used for hundreds of years for industrial power. Their main shortcoming is size, which limits the flow rate and head that can be harnessed. The migration from water wheels to modern turbines took about one hundred years. Development occurred during the Industrial revolution, using scientific principles and methods. They also made extensive use of new materials and manufacturing methods developed at the time. Swirl The word turbine was introduced by the French engineer Claude Burdin in the early 19th century and is derived from the Greek word "τύρβη" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kinetic Energy
In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when decelerating from its current speed to a state of rest. Formally, a kinetic energy is any term in a system's Lagrangian which includes a derivative with respect to time. In classical mechanics, the kinetic energy of a non-rotating object of mass ''m'' traveling at a speed ''v'' is \fracmv^2. In relativistic mechanics, this is a good approximation only when ''v'' is much less than the speed of light. The standard unit of kinetic energy is the joule, while the English unit of kinetic energy is the foot-pound. History and etymology The adjective ''kinetic'' has its roots in the Greek word κίνησι� ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydraulic Head
Hydraulic head or piezometric head is a specific measurement of liquid pressure above a vertical datum., 410 pages. See pp. 43–44., 650 pages. See p. 22. It is usually measured as a liquid surface elevation, expressed in units of length, at the entrance (or bottom) of a piezometer. In an aquifer, it can be calculated from the depth to water in a piezometric well (a specialized water well), and given information of the piezometer's elevation and screen depth. Hydraulic head can similarly be measured in a column of water using a standpipe piezometer by measuring the height of the water surface in the tube relative to a common datum. The hydraulic head can be used to determine a ''hydraulic gradient'' between two or more points. "Head" in fluid dynamics In fluid dynamics, ''head'' is a concept that relates the energy in an incompressible fluid to the height of an equivalent static column of that fluid. From Bernoulli's principle, the total energy at a given point in a flui ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computational Fluid Dynamics
Computational fluid dynamics (CFD) is a branch of fluid mechanics that uses numerical analysis and data structures to analyze and solve problems that involve fluid flows. Computers are used to perform the calculations required to simulate the free-stream flow of the fluid, and the interaction of the fluid ( liquids and gases) with surfaces defined by boundary conditions. With high-speed supercomputers, better solutions can be achieved, and are often required to solve the largest and most complex problems. Ongoing research yields software that improves the accuracy and speed of complex simulation scenarios such as transonic or turbulent flows. Initial validation of such software is typically performed using experimental apparatus such as wind tunnels. In addition, previously performed analytical or empirical analysis of a particular problem can be used for comparison. A final validation is often performed using full-scale testing, such as flight tests. CFD is appli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydropower
Hydropower (from el, ὕδωρ, "water"), also known as water power, is the use of falling or fast-running water to produce electricity or to power machines. This is achieved by converting the gravitational potential or kinetic energy of a water source to produce power. Hydropower is a method of sustainable energy production. Hydropower is now used principally for hydroelectric power generation, and is also applied as one half of an energy storage system known as pumped-storage hydroelectricity. Hydropower is an attractive alternative to fossil fuels as it does not directly produce carbon dioxide or other atmospheric pollutants and it provides a relatively consistent source of power. Nonetheless, it has economic, sociological, and environmental downsides and requires a sufficiently energetic source of water, such as a river or elevated lake. International institutions such as the World Bank view hydropower as a low-carbon means for economic development. Since ancient t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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