[Aneeb]

Hi,

I am using transient blade row modeling for 2 Stage axial Fan (2 rotors - 2 stators with no of blades as R1-28, S1-46, R2-60 and S2-59) and have a total of 03 interfaces. Pitch ratio limit (0.75-1.4) is already accounted for by modeling an appropriate number of passages and also the fluid is compressible.

Under 'Transient Blade Row Model' setting (as per guidance from Ansys CFX solver modeling guide 2021-topic 6.1.8.5.3) I want to model the setup with both TT and PT disturbances across rotor-stator interfaces as the stage count is greater than 1.5, Hence, I want to use only one TT disturbance at my S1-R2 interface as this is the R2 inlet (probable shock location) and other R1-S1, R2-S2 interfaces as PT disturbance.

Now I want to ask that do I need to create the TT and PT disturbances separately, or I just create one TT disturbance at S1-R2 interface and the CFX will automatically take the other 2 as PT disturbances (considering I have used TRS- interface for all 03 interfaces)? If not then how to create the separate TT and PT disturbance at the same time as I only have the provision of opting either Time Transformation or Profile transformation at one time (Transient Blade Row Modles>Options- dropdown menu).

In the Ansys modeling guide for this type of case setup only the TT- disturbance is created but not much clarity is there regarding PT disturbance creation.

Any help is really appreciated.
Best Regards