What is the relationship between cavitation margin and flow rate?
Thread Content
Under unchanged other conditions, is there any relationship between flow rate and net positive suction head?
Based solely on the pump’s performance curve, the pump’s NPSHr increases as the flow rate increases.
According to the performance curve of centrifugal pumps, the net positive suction head increases as the flow rate increases, but it does not increase in direct proportion to the pipeline
The net positive suction head increases as the flow rate increases, but not in a direct proportional manner; please refer to Page 99 of the first volume of Principles of Chemical Engineering (Tianjin University edition).
It is reflected on the performance curve of the centrifugal pump, but there should be a theoretical formula; I haven’t found one. Those who are aware of it please share it.
Can it be said that, other conditions remaining constant, the greater the flow rate, the less likely cavitation is to occur?
After studying the principles of chemical engineering, it can be concluded that as the flow rate increases, the net positive suction head also increases, which requires a lower installation height; if the installation height is not reduced, cavitation is likely to occur. What I said above is incorrect. :lol
You can find out by looking at the performance curve of a pump: as the flow rate increases, the net positive suction head also increases