Centrifugal Pumps - Stable and Unstable Flow
The characteristics of stable and unstable flow.
For stable head-flow characteristic the differential head - h - progressively falls with increasing flow rate - q.
For unstable head-flow characteristic the differential head - h - rises to a maximum and then progressively falls with increasing flow rate - q.
An unstable pump may start to oscillate between the two possible combinations of head-flow. The flow rate will modulate and the pipeline vibrate.
It is recommended that centrifugal pumps are designed and operated under stable conditions.
Related Topics
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Pumps
Design of pumping systems and pipelines. With centrifugal pumps, displacement pumps, cavitation, fluid viscosity, head and pressure, power consumption and more.
Related Documents
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Alternating Pumps
Securing a system and achieve equal wear by alternating pumps in parallel. -
Centrifugal Pump Standards
International centrifugal pump design and dimension standards. -
Centrifugal Pumps
An introduction to Centrifugal Pumps. -
Centrifugal Pumps - Minimum Flow
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Pumps - Classifications
Centrifugal pumps vs. positive displacement pumps. -
Pumps - Head vs. Pressure
Converting head (ft or m) to pressure (psi or bar, kg/cm2) and vice versa. -
Pumps - Specific Speed
Characterizing of impeller types in pumps in a unique and coherent manner.
