Nozzle is a device with varying x-sectional area through which the pressure energy of
flowing fluid decreases and the K.E. increases.
The main aim is to produce a jet of very high velocity
In the nozzle,
1 Nozzle is insulated so that no heat enters or leaves the system i e q = 0
2 No work is being done in the nozzle, w = 0
3 Changes in P.E. are negligible i.e. Z1 = Z2
Applying steady flow energy equation per unit mass
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