Fluids

Fluids

Pitch angle for side 1 and 2

    • abbas
      Subscriber

      Hello every body,


       


      I am working on turbine and I am confused about Pitch angle for side1 and 2. What does it mean?


       


      This is the domain that I uploaded in here. The first picture shows the stator and the second picture shows the rotor. I want to simulate half of


      the geometry. This is a Tesla turbine. So, I use the Frame Change/Mixing Model with Frozen Rotor.  In Pitch Change Options, there are some options but the automatic doesn't work and I have to choose the Specified Pitch Angles. So what does it mean and what angles should I choose.


       


      Best regards


      abbas


       


       



    • DrAmine
      Ansys Employee
      By default, pitch ratio is computed as simply the area ratio of side 1 and side 2. So ideally one only changes in Theta direction. Realistically that differs from one but you need to provide a value near to one as in the axial turbine tutorial.
    • abbas
      Subscriber

      Thanks for your help. However, what would be the pitch in my case, because, for my case, the disk which is a rotor is rotating and if I correctly understand your words, it means that the pitch ratio should be 1?


       


      Best regards


      Abbas

    • DrAmine
      Ansys Employee
      Best to be near one as in the workshop
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