Changes in outlet pressure, inlet pressure, and flow rate when cavitation occurs in a centrifugal pump
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If there is air at the inlet of a centrifugal pump, cavitation will occur. Without making any adjustments, will the inlet pressure decrease accordingly? Can Bernoulli’s principle be applied to the relationship between inlet pressure and flow rate? After the inlet pressure decreases, does the flow rate increase or decrease, and how does the outlet pressure change? Will it get smaller?
Fluctuations in outlet pressure and flow, or values that are too low
It will not decrease； No. After cavitation, the pump reduces the suction pressure or brings it to zero.
It is explained in the textbook on chemical engineering principles, a
The presence of gas will cause gas entrapment, rather than cavitation
Fluctuations in outlet pressure and flow, or low values, can severely damage the pump’s impeller
OP, I’ll answer your last question: when the inlet pressure decreases, does the flow rate increase or decrease? And how does the outlet pressure change? Will it get smaller? After the inlet pressure decreases, the flow rate generally remains unchanged, but the outlet pressure will decrease