Fluids

Fluids

Combustion (Partially premixed combustion vs Non-premixed combustion )

    • raghava
      Subscriber

      Hi,


           I am working on the combustion of ammonia, I am facing some issues


      1) When I implement Non-premixed combustion, I could visualize combustion but when I try partially premixed combustion I am unable to see combustion. Can someone help me out with the reason/ remedy for the same?


       Also, I supplied the laminar burning speeds from detailed 1-D simulations for the partially premixed combustion model. 


       Thanks and regards,


      Raghavendran Raman

    • Rob
      Ansys Employee

      Is your system premixed or not? You may also need to patch a high temperature region into the zone and a small amount of products to get the calculation started. 

    • raghava
      Subscriber

      Thanks for the message. The system is a non-premixed configuration but since ignition of ammonia takes time, I choose partially premixed combustion model. I did patch progress variable to 1 in the partially premixed model. 


      Regards,


      Raghavendran Raman 

    • Rob
      Ansys Employee

      If it's non-premixed I'd stick with that approach: premixed is for when the fuel & oxygen enter through the same inlet. 

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