Centrifugal pump impeller diameter increased by one centimeter, head can increase the number of other conditions remain unchanged
D for the original design of pump impeller diameter, D1 is the diameter of the pump impeller after the change. From the above formula can be clearly seen, with the changing of impeller head is related with the ratio, and the actual amount (a CM) has nothing to do, the reason is very simple, if the original is 1, increased by 1, indicates that an increase of 1 times, if the original is 100, increased by 1, while an increase of only%1.
Because, according to the theoretical calculation of pump (impeller) can be deduced from the theorem of impeller cutting: cutting or increase of impeller diameter, the volume is not the case, before and after the pump head is its diameter before and after the ratio is proportional to the square of H/H1= (D/D1) ^2, where H is the original design of the pump head. H1 for the change of the impeller diameter after lift
Centrifugal pump in other conditions remain unchanged, the impeller diameter increased by one centimeter, head can increase how much, this problem is no answer.
