What Is the Adiabatic Flame Temperature Calculator?
Adiabatic flame temperature is the temperature resulting from a complete combustion process that occurs without heat transfer or changes in kinetic and potential energy.
How Does the Adiabatic Flame Temperature Calculator Work?
Applies the first law of thermodynamics to equate combustion enthalpy release to product sensible heat rise.
Computes temperature lift ΔT and peak flame temperature.
Adiabatic Flame Temperature Calculator Formula & Variables
The core mathematical equation utilized by this calculator is expressed as:
ΔT = LHV / [ (1 + AFR) · Cp_mean ], T_ad = T₀ + ΔT
Constant-pressure first law enthalpy conservation for complete adiabatic combustion.
How to Use the Adiabatic Flame Temperature Calculator
- Input reactant starting temperature T₀.
- Enter fuel LHV in kJ/kg and operating air-fuel ratio.
Step-by-Step Example Calculation
Methane-Air Combustion at 298 K
Input Values:
initialTemp:298
lhv:45000
afr:15
cpMean:1.25
Worked Steps: Hydrocarbon combustion at AFR = 15 yielding ~2548 K flame temperature.
Understanding Your Result
Primary output displays flame temperature in Kelvin and Celsius.
Summary displays temperature rise and product mass.
Factors That Affect the Result
- Excess air (excess air acts as a thermal ballast diluent, cooling the flame).
- High-temperature dissociation of CO₂ and H₂O.
When Should You Use This Calculator?
- Gas turbine combustor design, furnace thermal analysis, and thermal NOx estimation.
Assumptions & Limitations
- Assumes constant mean Cp and no chemical dissociation.
Frequently Asked Questions
Calculation Accuracy & Reference Note
First-law thermodynamic enthalpy balance.