Spray combustion

- June 28, 2019 at 7:03 am
  
  kedy4ect
  Subscriber
  
  Hi,
  
  I am currently working on a liquid fuel spray jet. The model that I am using to create the spray jet is the DPM model. The figure below shows an axis-symmetry geometry of the combustion chamber and the liquid fuel is injected at point (0,0) which is the centre axis of the spray jet.
  
  However, by using the same DPM settings, when the fuel is being injected at some distance above the axis, the spray jet does not developed as the previously one. The picture below shows the spray injected at some distance above from the axis. Can anyone help me with this?
  
  Thanks a lot..
- July 1, 2019 at 4:10 pm
  
  Rob
  Ansys Employee
  
  Think about the model: it's axi-symmetric. If I add an inlet at the centre and then rotate to 360 degrees what shape do I get? Now do the same for the jet at a different position, what shape will that be if rotated by 360 degrees?
- July 1, 2019 at 4:20 pm
  
  kedy4ect
  Subscriber
  
  Hi..
  
  Thanks for the reply. Yeah, I know the first picture is an axis-symmetry spray jet. It will eventually form a spray cone at 360 degrees.
  
  However, my concern is to create a spray jet that is sprayed at an angle into the computational domain. I have tried changing the 2D plane from axisymmetric to planar but the spray jet is still not developing.
  
  Thanks
  
  Regards
- July 2, 2019 at 9:33 am
  
  Rob
  Ansys Employee
  
  Think what you're defining: in the case where the jet is off centre you're modelling an annular slot: why would you expect the same jet shape?

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