Abstract: Building facade ejected fire behavior characteristics is one of the important research orientations in fire research, particularly the ejected flame of facade fire is related to the fire hazard of adjacent buildings under the effect of cross wind. Based on Froude similarity theory, through the fire experiments by employing a reduced-scale fire compartment, this paper studied the ejected flame expansion characteristic under different cross wind speeds, heat release rates and opening size. The influence of wind speed on flame shape is analyzed, and a new subsection prediction model for the ejected flame length with different compartment openings and HRRs is proposed, providing references for fire protection design of building facade.

Key words: building fire, ambient wind, ejected fire, ejected flame length