William Froude

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William Froude

William Froude frood , 1810-79, English engineer and naval architect, brother of J. Anthony Froude ; educated at Oxford. In 1837 he worked on the Bristol and Exeter railroad, constructing the line from the Whitehall tunnel to Exeter. He studied the motion of a ship among waves, demonstrating that the rolling of a ship could be reduced by a deep bilge keel. This fact and his conclusions on the relationship between construction design, efficiency, and power in screwships were extensively used by the Royal Navy. He also constructed a dynamometer for measuring the power of large marine engines.

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Froude number

A Dictionary of Ecology | 2004 | | Â© A Dictionary of Ecology 2004, originally published by Oxford University Press 2004. (Hide copyright information) Copyright

Froude number(Fr) A dimensionless number equal to the ratio of water velocity to the speed of a gravity wave, used to assess whether flow in an open channel is critical, tranquil, or shooting. If the Froude number is less than 1, flow is said to be subcritical or slow; if Fr = 1 flow is critical; and if Fr is greater than 1 flow is fast or supercritical. It was calculated by the English engineer William Froude (1810–79).

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