Learning Forum

[Minh Duc Ha]

Hi everyone,

I'm trying to make a model of a 4-stage axial compressor using Multistage Cyclic Symmetry and there are some points that I understand not very well.

1. How to create a contact in a model using MultiStage Cyclic Symmetry?

If I understand correctly, the contact between two different Stages is not available, so I have to include two parts of the contact in a single Stage. For example, the 2ndStage of the compressor is connected to the 3rdStage by bolts. I replace the bolts with bonded connections. If I scope the 2ndStage to one part and the 3rdStage to another part, then define them as two separate Stages of multi-stage cyclic symmetry, I can't create the contact between them. So I define the 2ndStage as two separate parts and define Stage3 as comprising the 3rdStage and part of the 2ndStage to create the bonded connection inside Stage3. In this case, 2 parts of the 2ndStage are connected by Interstage. 
What do you think? Is there another way of defining the contact in this case?

2. How could I do to expand each Stage to 360deg full section with different angle?

Could you please give me some advices for this problem.

Thank you in advance

[Ashish Khemka]

Hi,

Can you please share an image of the actual setup of the model? This will help the forum members to comment more.

Regards,

Ashish Khemka

[dlooman]

You need to use Interstage objects as described in Mechanical Tutorial 13.  https://ansyshelp.ansys.com/Views/Secured/corp/v232/en/mech_tut/ds_MStag_Comp_tut.html