April 14, 2023 at 10:33 amElisaSubscriber
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
April 27, 2023 at 6:32 pmJudy CooperAnsys Employee
This should be possible if the change you make has a significant impact on temperatureThe 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,Judy
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