Effect of tilt on the flame spread rate
- As the tilt angle is increased, initially a sharp decrease in the flame spread rate is observed (till Θ = 30°).
- Beyond Θ = 30°, the change in the flame spread rate in marginal.
- The higher flame spread rate at the tilt angle Θ = 0°, is due to buoyancy.
Effect of soaking on the flame spread rate
- Soaking of fuel with another fuel (Jet A1 or aviation turbine fuel) increases the flame spread rate.
- However, soaking with a retardant will obviously reduce the flame spreading rate.
Effect of fuel thickness on the flame spread rate
- As the fuel thickness increases, the flame spread rate decreases.
- With increase in fuel thickness, the residence time of flame become more and resulting in a lower flame spread rate.
- Hence the flame propagates at a faster rate for solid fuel with less thickness.
