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Adiabatic Flame Temperature

Approximate adiabatic flame temperature from fuel LCV, stoichiometric products and excess air. Bounded by gas dissociation in practice.

Combustion
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Formula, assumptions, and limits

Tad=Tin+LCV(AFR+1)cpT_{ad} = T_\text{in} + \frac{\text{LCV}}{(AFR + 1) \cdot c_p}
SymbolMeaningUnit
LCVLCVLower calorific valuekJ/kg
AFRAFRActual air-fuel ratio
cpc_pMean product specific heatkJ/(kg·K)
TinT_\text{in}Inlet air temperature°C

Source: Heywood - Internal Combustion Engine Fundamentals

In short

Approximate adiabatic flame temperature from fuel LCV, stoichiometric products and excess air.

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