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What is Nozzle , Diffuser and Throat ?

 A Nozzle is any duct which increases the kinetic energy of the fluid at the expense of its pressure. 


A Diffuser is a passage through which a fluid loses kinetic energy and gains pressure. 

The same duct or passage may be either nozzle or diffuser depending upon the end conditions across it. 

The minimum section in it is a Throat. 



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