中文摘要：

建立了建筑外壁面开口火溢流行为的小尺寸模拟实验装置,采用汽油池火作为模拟火源,研究了15,cm、25,cm和35,cm共3种典型不同尺寸的油池火在0°、45°、60°和75°共4种不同斜坡受限角度下的燃烧室内及开口外部溢流的温度场分布特性.研究结果表明,随着斜坡角度的增大,对于较小尺寸的火源（15,cm）,燃烧室内一直处于较完全的燃烧状况,燃烧室内及开口外部溢流的温度场变化较小;对于较大尺寸的火源（35,cm）,在斜坡角度为0°时燃烧室内便发生不完全燃烧,有大量的火焰溢出,开口外部溢流温度场一直较高且变化小;而对于中等尺寸的火源（25,cm）,斜坡角度的影响明显,燃烧室内由于供氧的限制从较充分的燃烧过渡为不完全燃烧,室内中心线及靠近窗口的角落温度降低,但燃烧室后端内侧角度的温度则不断升高,外部火溢流的高度和温度均出现显著增加.当发生火焰溢出时,近壁面处溢流的竖向分布呈现特殊的中部＂低温区域＂.

英文摘要：

A reduced model is developed to study room fire window spill flame behavior,and square gasoline pool fires with the lengths of 15 cm,25 cm and 35 cm are used as fire sources.The room fire and window spill flame tem-perature distributions are investigated under the constrain slopes of 0°,45°,60° and 75°.Results shows that,with the increase of slope angle,for the small fire（15 cm）,the combustion within the room remains relatively complete so that temperature distributions of room fire and window spill plume change little;for the large fire（35 cm）,the combustion within the room is relatively incomplete,a large amount of flame is observed to spill out through the opening,and spill flame temperature is high and also changes little;however,for the medium fire（25 cm）,the influence of slope is remarkable,the combustion within the room transfers from relatively complete to incomplete,the room temperature both along the center line and in the corner near the window decreases,while that in the inner corner increases,and spill flame temperature and height are shown to increase greatly.When flame is observed to spill out directly,there exists a special ＂low temperature domain＂ for the vertical temperature distribution near the wall.