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flame_temperature inPREPDF??

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Old   April 20, 2005, 05:33
Default flame_temperature inPREPDF??
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hi everybody Iam prepdf4.0 simulationg chemistry(CxHy+air----> co2+h2o+oh+h2+.... : 11 species) with adiabatic and non adiabatic approachs, when looking the pdf tables, the peak flame temperature in non adiabatic case is (!!!!!) HIGHER than the one for the adiabatic case!!. is it possible? and how get an physical explanation
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Old   April 20, 2005, 07:40
Default Re: flame_temperature inPREPDF??
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In the non-adiabatic case prePDF computes the profiles at different enthalpy levels.

I think it takes into account both heat losses and heat gains (i.e. positive heat flux toward the reaction region).

If so, if you look at the profiles for an enthalpy level higher than the adiabatic case, you will have higher peak temperature.

Check all the enthalpy slices in your non-adiabatic look-up table, and verify if the temperature is lower in some slices.

Best regards,

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