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-   -   LImitation of CFX program in turbomachinery (http://www.cfd-online.com/Forums/cfx/25807-limitation-cfx-program-turbomachinery.html)

dia aisa May 13, 2008 04:42

LImitation of CFX program in turbomachinery
 
daer all please, i want to know what are the limitation of CFX software offered in ANSYS,my work focused in axial flow turbine ,but in all documentation i coud not found the limitation of the pachage

wayne May 13, 2008 10:57

Re: LImitation of CFX program in turbomachinery
 
it is a really question.i want to know the different between ANSYS CFX and NUMECA FINE/TURBO for turbomachinery,but it is really quiet convient to do the pre and post.and i dont know if it can run pre and post in parallel way?


HekLeR May 13, 2008 19:22

Re: LImitation of CFX program in turbomachinery
 
CFX can simulate an axial flow turbines.

There are three different models which allow you to *not* simulate the entire 360 degree machine.

Frozen Rotor and Stage can be used for steady state calculations with a change of pitch or shape. Frozen Rotor gives a ball park approximation at best, stage mixes out the flow going from one component to the next.

Transient Rotor Stator is used for transient and accounts for change of pitch and shape between components.

CFX beginner May 19, 2008 07:40

Re: LImitation of CFX program in turbomachinery
 
There is a software named TurboGrid about the turbomachinery.

Farid May 20, 2008 12:40

Re: LImitation of CFX program in turbomachinery
 
Hi HekLeR,

In my case, I made a circular domain and the center is not located at the origin. But, the domain is rotating around the origin though it should rotate around the center of the domain.

Can you please tell me the way to change the pivot of rotating domain when I am using the Transient Rotor stator Model?


HekLeR May 23, 2008 21:41

Re: LImitation of CFX program in turbomachinery
 
I think I answered this already. See my other post. Use teh two point option or setup a coordinate frame which is not centered at 0,0,0. Select your custom coordinate frame axis x,y or z (depending which one lines up with the machine axis).

Farid May 23, 2008 22:53

Re: LImitation of CFX program in turbomachinery
 
HekleR,

Thanks a lot.

Farid



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