First, the relationship between the exit and blade mounting angle β2A
When the others remain the same, the larger the blade exit angle, the more the flow theory is increased with the increase in the elevator, and the smaller the angled blade outlet is, the lower the theoretical head is as the flow increases.
Second, the relationship with the number of leaves
The other is a constant, without considering the flow loss, the more the number of leaves, the more theoretical head. This is due to the fact that a limited amount of liquid in the impeller blades can provide infinitely less energy than in the impeller blades.
Third, the relationship with speed
By Euler's equation, it can be concluded that higher speeds and larger theoretical heads.