NPSH

（重定向自Net positive suction head）

A simple hydraulic pumping circuit. Point 0 is the free suction surface, and point i is the inlet of the impeller.

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.

单词	Net positive suction head
释义	Net positive suction head 英语百科 NPSH （重定向自Net positive suction head） 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.
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