NPSH
In a hydraulic circuit, net positive suction head (NPSH) may refer to one of two quantities in the analysis of cavitation:
NPSH is particularly relevant inside centrifugal pumps and turbines, which are parts of a hydraulic system that are most vulnerable to cavitation. If cavitation occurs, the drag coefficient of the impeller vanes will increase drastically - possibly stopping flow altogether - and prolonged exposure will damage the impeller.
NPSH in a Pump
In a pump, cavitation will first occur at the inlet of the impeller. Denoting the inlet by i, the NPSHA at this point is defined as:
where 
is the absolute pressure at the inlet, 
is the average velocity at the inlet, 
is the fluid density, 
is the acceleration of gravity and 
is the vapour pressure of the fluid.
Podcasts:
Natalie Portman's Shaved Head
ALBUMS
- Glistening Pleasure released: 2008
-
by Innpeach
007
by: Innpeach(PT Lauren , K-Dee)
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