Flow through Nozzle at the end of a Pipe

A nozzle is a tapering mouthpiece which is fitted to the end of a water pipe line to discharge water at a high velocity. A nozzle is generally made of convergent shape. The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is one-third of the total supply head at the inlet of the pipe. The diameter of the nozzle (d) for maximum transmission of power is given by


 
where
D = Diameter of pipe,
f = Darcy's coefficient of friction for pipe, and
l = Length of pipe.

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