5 Replies Latest reply on Apr 10, 2014 9:16 PM by Jared Conway

# Calculating Head pressure of CENTRIFUGAL PUMP

Dear friends

I made a flow study of the pump shown in the pic inserted I defined the inlet and outlet as Environment Pressure and I also defined the Rotating Region of the impeller and I calculated the drop pressure and the Efficiency as goals of my project.

My question is : how can define THE HEAD PRESSURE RATE [M] and the GRAPH of (H,Q) Q=Volume flow rate?

Best Regards

• ###### Re: Calculating Head pressure of CENTRIFUGAL PUMP

Why wouldn't you define them as equation goals?

Or are you asking what the equations are?

Or are you asking how to create a graph that shows a parameter under multiple conditions? This is straight forward, use parameter studies. Someone asked this recently, you may want to check recent posts for pumps...etc for more details on the process. But basically you setup the problem and have flow simulation run through all the iterations then you can build your graph. Or clone the study, make the changes yourself and then output the data and make your graph.

• ###### Re: Calculating Head pressure of CENTRIFUGAL PUMP

Mr.Jared

Thank you for your replay,and that is very usefull to use parameter study,but I am realy asking what the equation is? and what is related to!!

• ###### Re: Calculating Head pressure of CENTRIFUGAL PUMP

who's asking you for the parameters?

do you have definitions of what those parameters are?

• ###### Re: Calculating Head pressure of CENTRIFUGAL PUMP

I found this equasion :

h = (p2 - p1)/(ρ g) + v22/(2 g)

where

h = total head developed (m)

p2 = pressure at outlet (N/m2)

p1 = pressure at inlet (N/m2)

ρ =   density (kg/m3)

g = acceleration of gravity (9.81)  m/s2

v2 = velocity at the outlet (m/s)

I think this usefull for my study

what do you say?

• ###### Re: Calculating Head pressure of CENTRIFUGAL PUMP

looks like it could be used to compare designs