Please specify the reason, the more detailed the better, the head is the pump 1N fluid on the work done, when the flow rate increases, the shaft power increases, but it does not necessarily have to do with the head of the relationship
First of all, the power of the pump is determined by the motor. When the power is certain, work must be done. According to w=mgh, the flow determines mg, the head is h, you think, if the flow rate is large, is the head smaller?. This is theoretical, and at the same time, you see, the water pump characteristic curve can also see that the flow rate increases, the corresponding smaller head.
First of all, the power of the pump is determined by the motor. When the power is certain, work must be done. According to w=mgh, the flow determines mg, the head is h, you think, if the flow rate is large, is the head smaller?. This is theoretical, and at the same time, you see, the water pump characteristic curve can also see that the flow rate increases, the corresponding smaller head.
When the power increases to a certain extent, can not be increased, so when the flow increases, the head can only be reduced
