After the impeller is cut, how are parameters such as flow rate and head improved?
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I read a paper that contained a statement saying that after the impeller is cut, the flow rate, head, power, and other parameters of the water pump decrease or increase accordingly. I understand reducing it, but what is the reason for increasing it?
After the impeller is cut, the flow rate and head of the water pump do not increase; instead, they decrease. Here is one case: Q1/Q2 = D1/D2 and H1/H2 = (D1/D2)2. There are other cases as well, but they will not be listed here.
After cutting, the head increases while the flow rate decreases! Experience!
The original poster can understand it by looking at the impeller cutting law and the proportionality law