Laminar Burning Velocity Calculator

Laminar Burning Velocity Calculator: Temperature-Corrected Flame Speed

Laminar burning velocity is not a fixed property of a fuel - it rises noticeably as the unburned gas gets hotter, which matters for preheated combustion systems and recuperative burners. This calculator applies a power-law temperature correction to a known reference velocity.

The Formula

S_L = S_L,ref × (T_u / 298)²

Where S_L,ref is the laminar burning velocity measured at a 298K reference temperature, and T_u is the actual unburned gas temperature.

Worked Example

Methane-air at stoichiometric conditions has a reference laminar burning velocity of about 0.40 m/s at 298K. Preheating the unburned mixture to 500K:

S_L = 0.40 × (500 / 298)² = 1.13 m/s

How to Use This Calculator

1. Enter the reference laminar burning velocity at 298K for your fuel-air mixture.
2. Enter the actual unburned gas temperature in Kelvin.
3. Click Calculate to see the temperature-corrected burning velocity.

Related Calculations

Feed the result into the Turbulent Flame Speed Calculator to account for turbulence, or the Laminar Flame Thickness Calculator to estimate flame thickness at this velocity.