Simulation of a single passage and volute

Suzzn · January 5, 2010, 06:44

Hello,

i try to simulate a centrifugal compressor with diffuser and volute. My aim is to investigate the influence of different geometry-variables of impeller and volute on the characteristic of the compressor, especially on surge and stall! So i will need many simulations. To reduce computational time I want to consider only a single passage as part of the computational domain. But as I want to see the influence of the volute too, i wonder if there is a possibility to rotate the result of the simulation of the single passage (impeller and diffuser) in order to use it as inlet condition for the simulation of the volute part? Hope someone understands my question and got an answer...

Best regards
Susann

Attesz · January 5, 2010, 08:05

Hi,

I don't understand your problem. Do you want to rotate the impeller physically?
When you define the stage interface, with the "Pitch change" option can you set the periodicity, wich "rotates" the results at interface, and gives the inlet parameters for the volute. Read about this in cfx help!

Regards,
Attesz

January 5, 2010, 06:44	Simulation of a single passage and volute	#1
Suzzn Member Susann Join Date: Apr 2009 Location: Dresden Posts: 33 Rep Power: 17	Hello, i try to simulate a centrifugal compressor with diffuser and volute. My aim is to investigate the influence of different geometry-variables of impeller and volute on the characteristic of the compressor, especially on surge and stall! So i will need many simulations. To reduce computational time I want to consider only a single passage as part of the computational domain. But as I want to see the influence of the volute too, i wonder if there is a possibility to rotate the result of the simulation of the single passage (impeller and diffuser) in order to use it as inlet condition for the simulation of the volute part? Hope someone understands my question and got an answer... Best regards Susann

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January 5, 2010, 08:05		#2
Attesz Senior Member Attesz Join Date: Mar 2009 Location: Munich Posts: 368 Rep Power: 17	Hi, I don't understand your problem. Do you want to rotate the impeller physically? When you define the stage interface, with the "Pitch change" option can you set the periodicity, wich "rotates" the results at interface, and gives the inlet parameters for the volute. Read about this in cfx help! Regards, Attesz