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

spk · February 28, 2012, 15:53

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, 20:03

Any ideas please!!!

A.farid · March 29, 2012, 06:36

Hi,

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

February 28, 2012, 15:53	How to define hydraulic or total efficiency in a centrifugal pump?	#1
spk Member Join Date: Aug 2009 Posts: 67 Rep Power: 15	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

February 28, 2012, 17:24		#2
spk Member Join Date: Aug 2009 Posts: 67 Rep Power: 15	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. Last edited by spk; February 28, 2012 at 17:46.

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March 4, 2012, 05:14		#3
A.farid New Member a.farid Join Date: Feb 2012 Posts: 14 Rep Power: 13	hi can yo tell me about the meshing tool

March 4, 2012, 05:18		#4
A.farid New Member a.farid Join Date: Feb 2012 Posts: 14 Rep Power: 13	hi farid what is your meshing program

March 5, 2012, 09:40		#5
spk Member Join Date: Aug 2009 Posts: 67 Rep Power: 15	Hi, I use Gambit.

March 6, 2012, 02:54		#6
A.farid New Member a.farid Join Date: Feb 2012 Posts: 14 Rep Power: 13	may i have a tutorial how to model a centrifugal pump with three zones inlet, outlet and impeller

March 16, 2012, 07:32		#7
spk Member Join Date: Aug 2009 Posts: 67 Rep Power: 15	Any ideas?

March 17, 2012, 04:53		#8
A.farid New Member a.farid Join Date: Feb 2012 Posts: 14 Rep Power: 13	Hi, I need any tutorial to start meshing a centrifugal pump by gambit

March 17, 2012, 09:27		#9
spk Member Join Date: Aug 2009 Posts: 67 Rep Power: 15	I don't have any tutorial in order to mesh a centrifugal pump! You can read the fluent tutorials about meshing in general!

March 18, 2012, 01:57		#10
A.farid New Member a.farid Join Date: Feb 2012 Posts: 14 Rep Power: 13	Hi, thank you for help

March 28, 2012, 20:03		#11
spk Member Join Date: Aug 2009 Posts: 67 Rep Power: 15	Any ideas please!!!

March 29, 2012, 06:36		#12
A.farid New Member a.farid Join Date: Feb 2012 Posts: 14 Rep Power: 13	Hi, send your e mail to me and i will send you a paper apout how to define efficiency