Coal combustion in Non-premixed combustion

- September 17, 2018 at 7:22 pm
  
  cehangir
  Subscriber
  
  Hi
  
  I am doing non-premixed combustion for coal using single mixture fraction method. I have two inlets. Primary inlet is for the coal+air, and secondary inlet is for the air. I have DPM injection set to be 0.03 kg/s, based on the HCV of coal for 70kW thermal input as surface injection at primary inlet.
  
  When setting up boundary conditions for the inlets, I have set mean mixture fraction set as 0 (air in gaseous phase) for the primary and secondary inlets. However, the flame produced is very tiny as compared to the flame I have produced using EDM combustion.
  
  I am under the assumption that the volatiles are introduced after the devolatilization in the system, which is why I set the mean mixture fraction as 0. Is it a right approach ? Or do I have to set the mean mixture fraction in the primary inlet to a value >0 to accommodate for the volatiles produced during devolatilization ?
- September 19, 2018 at 2:08 am
  
  Karthik R
  Administrator
  
  Hello,
  
  I've moved your post to the Fluid Dynamics thread so it gets more visibility on the community.
  
  Thank you.
  
  Best Regards,
  
  Karthik
- September 20, 2018 at 4:11 am
  
  seeta gunti
  Ansys Employee
  
  Hello Cehangir,
  
  Regarding your query on coal combustion, we have a video tutorial in our youtube channel. Please go through the following link.

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