Abstract
Model fire experiments were conducted to characterize the effect of wind on flame properties in free boundaries. Propane gas was used as a fuel and 0.1m×0.1m diffusion burner was also employed as a model fire source. The effects of floor around a fire source, which would control the volume entrained into the hot current, were also investigated. The empirical models on the apparent flame height of the inclined flame were presented. We also deduced the empirical models on the flame tilt angle based on the balance of mass flux and/or forces, which are employed as governed variables for representing the upward hot current and wind. These models are represented by the simple formula with dimensionless heat release rate and Froude number. The calculated flame length based on the flame tilt angle and the apparent flame height was compared with experimental results, and which showed the models are applicable to estimate the flame length under the wind condition.
