Question

A centrifugal pump provides a flow rate of 0.03 m/s when operating at 1750 rpm against 60 m head. Determine the pump's flow rate and developed head if the pump speed is increased to 3500 rpm.

Answer 1

Answer:240m

`Q=0.06m^3/s`

Step-by-step explanation:

Given rpm increases from 1750 rpm to 3500 rpm

initial head 60 m and flow rate=
`0.03 m^(3)/s`

Since unit speed remains same

therefore

`N_u=(N)/(√(H))`

`(1750)/(√(60))`=
`(3500)/(√(H))`

H=240m

Also unit Flow remains same

`(Q)/(√(H))`=
`(Q)/(√(H))`

`(0.03)/(√(60))`=
`(Q)/(√(240))`

`Q=0.06m^3/s`