Chemkin Pro hydrogen combustion

    • Elisa

      Hi all :) 

      I am trying to model hydrogen combustion in the multizone homogeneous charge compression ignition engine model in Chemkin Pro. I need to be able to include hot surface ignition in the model. I have tried increasing the wall temperature (in the heat transfer tab) but this did not appear to have any effect. Can anyone tell me how I can represent hot surface ignition in these models please? Or if it is even possible.

      really grateful for any help

    • Judy Cooper
      Ansys Employee

      Hi Elisa:

      This should be possible if the change you make has a significant impact on temperature

      The HCCI engine model has options for the heat transfer models (under the "Heat Transfer Parameters" tab): 
      As a simple test, I would try the Heat Loss Heat Transfer Option first, because you can specify how much energy is removed from the system:
      For the adiabatic condition, simply set the "Heat Loss" to 0.0:
      Then, try a non-zero heat loss to evaluate the difference.
      Heat loss affects the engine gas temperature, and most common combustion reaction rates are temperature-dependent; so changing the heat loss rate (heat transfer parameters) will have an impact  on the reaction rates.   (This effect will be positive or negative depending on the fuel species and conditions.)
      I hope this helps.
      Best Regards,


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