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-   -   How to define hydraulic or total efficiency in a centrifugal pump? (http://www.cfd-online.com/Forums/fluent/97938-how-define-hydraulic-total-efficiency-centrifugal-pump.html)

spk February 28, 2012 15:53

How to define hydraulic or total efficiency in a centrifugal pump?
 
Hi guys,

I simulate a 3d centrifugal pump using Fluent.
How can i define the hydraulic efficiency?
Or the total efficiency? The moment of the pump can be calculated?

Thanks

spk February 28, 2012 17:24

Total pump efficiency = ρgQH/M2πn

ρ=water density
g=gravitational accelaration
Q=flow rate
H=total head
M=moment
π=3.14
n=rotational speed

The moment can be calculated Report-> Forces-> Moments?
I chose moment center and the zone of the rotating impeller. Moment center is the center of the impeller?
The result is the total net moment? Fluent prints 3 values of the moment x, y, z. What can i do to obtain the final value of the moment in order to calculate pump efficiency? I just sum the three moments taking into consideration the positive and negatie signs?

Lastly, i use the MRF model.

A.farid March 4, 2012 05:14

hi can yo tell me about the meshing tool

A.farid March 4, 2012 05:18

hi farid what is your meshing program

spk March 5, 2012 09:40

Hi,

I use Gambit.

A.farid March 6, 2012 02:54

may i have a tutorial how to model a centrifugal pump with three zones inlet, outlet and impeller

spk March 16, 2012 07:32

Any ideas? :)

A.farid March 17, 2012 04:53

Hi,

I need any tutorial to start meshing a centrifugal pump by gambit

spk March 17, 2012 09:27

I don't have any tutorial in order to mesh a centrifugal pump! You can read the fluent tutorials about meshing in general!

A.farid March 18, 2012 01:57

Hi,
thank you for help

spk March 28, 2012 19:03

Any ideas please!!! :(

A.farid March 29, 2012 05:36

Hi,

send your e mail to me and i will send you a paper apout how to define efficiency


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