Centrifugal pump impeller issues
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A centrifugal pump has a head of 560 m and a flow rate of 240 m³/h; it features four impellers. If one of these impellers is removed, what would the theoretical head and flow rate be?
I think: the head is estimated to be about three-quarters of the original value, while the flow rate might be slightly higher than before.
If the four impellers are identical, the flow rate remains essentially unchanged, at 240, or it might be slightly lower； The head is basically 3/4 of the original value, at 405, or it could be higher.
240 cubic meters; the impeller should be a double-suction type. By removing one impeller, the head will be less than 3/4 of the original value
Simply looking at the pump’s performance curve, the flow rate remains unchanged while the head is three-quarters of its original value； If real pipelines in operation are considered, the flow rate is very low or no water can be delivered
The first half is correct; we have done similar things before, by removing half of the impeller of a multi-stage pump and installing it in another location for use.
Thank you all for the discussions. After the pump started running, the head was roughly as expected, but the flow rate decreased, to about 20-30 m3