NOZZLE :
Nozzle is a duct varying cross-sectional area in which the velocity increases with the corresponding drop in pressure.
It is main function is to produce a jet of steam with high velocity. For example, nozzles are used in steam turbines, gas turbines, in jet engines, rocket motors, flow measurement and many other applicants.
SHAPES OF NOZZLES :
Following 3 types of Nozzles are important from the subject point of view :
1. CONVERGENT NOZZLE :
In Convergent nozzle, the cross-sectional area decreases from the inlet section to the outlet section.
2. DIVERGENT NOZZLE :
In Divergent nozzle, the cross sectional area increases from the inlet section to the outlet section.
3. CONVERGENT - DIVERGENT NOZZLE :
When the cross section of a nozzle first decreases form the inlet section to throat and then increases from its throat to outlet section, it is called a convergent - divergent nozzle.
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