In this paper, we present an experimental study at laboratory scale of a wind driven fire entering a lateral canyon perpendicular to the main fire spread direction. This study is inspired on a multiple fatalities accident occurred in Armamar (Portugal), in 1985. The laboratory experiments show an eruptive fire behaviour inside the canyon. A rapid increase in the rate of spread and intensity of the fire is noticed when the fire enters the canyon, even though the wind is blowing perpendicular to the canyon axis. This increase is due to the presence of three factors: flow circulation inside the canyon, junction, and eruptive fire behaviours. The findings of this study contribute to better understand fire behaviour in complex terrain and therefore to improve personnel safety.

在本文中，我们提供了一个实验研究，该实验研究是在垂直于主火蔓延方向的侧向峡谷中进入侧向峡谷的风火。这项研究的灵感来自于1985年在Armamar（葡萄牙）发生的多起死亡事故。实验室实验表明，峡谷内有喷发的火警行为。当火势进入峡谷时，即使风垂直于峡谷轴线吹动，火势的蔓延速度和强度也会迅速增加。这种增加是由于以下三个因素的存在：峡谷内的水流循环，交汇处和喷火行为。这项研究的结果有助于更好地了解复杂地形中的火灾行为，从而提高人员安全性。