This paper is to quantify the external wind effects on flame behavior evolutions inside and outside a compartment with opposing openings. Temperature profiles at the windward and leeward corners inside the compartment as well as the external flame trajectories were investigated. Experimental results show that the flame shape inside the compartment changes from the windward symmetrical rotation flame to the leeward deflection flame, as the heat release rate increases or the external wind velocity decreases. It results from the competition between the buoyancy force of fire plume and the wind-driven flow field. Two external flame shapes, the horizontally ejected fire and spill-like plume, take place in sequence with decreasing wind velocity. The trajectory of horizontally ejected fire is perpendicular to the building façade. By validating coordinate values of trajectory databases for the spill-like plume, prediction correlations for the trajectory are developed with a notion of the physical process.

本文旨在量化外部风对带有相对开口的车厢内外火焰行为演变的影响。研究了舱室内的迎风角和背风角以及外部火焰轨迹的温度分布。实验结果表明，随着热量释放速率的增加或外部风速的减小，车厢内部的火焰形状从上风对称旋转火焰变为下风偏转火焰。它是由火羽的浮力与风力驱动流场之间的竞争产生的。随着风速的降低，两个外部火焰形状依次发生，即水平喷射的火焰和类似溢出的烟羽。水平射出的火的轨迹垂直于建筑立面。