窗外迎面风引起的多层建筑火灾流场特性

从理论上研究了不同楼层，位于楼房边侧或中间不同位置的房间发生火灾时，外界吹来正向的不同风速，对房间内外稳态温度场与流场的作用。特别研究了房间内热气流流出窗外向上运动的浮力和外界风力相互作用发生的现象及其对房间内流动的影响，引入了关于风的临界速度（或流量），作为外界风速与建筑物内火灾流场相互作用有标志性的重要参数，本文还对不同外界风速情况下，房间内外速度中性面倾斜的角度，房间内流出热气流温度的差别等诸多问题进行了详细的讨论。

The influence of wind on the fire flow field in multi-story

The effection of wind with different velocities and directions blowing towards a nd along a 4-storey building are studied in this paper. The air flow field and t emperature contours induced by a fire placsd at different positions are examined . The interactions of buoyancy of the hot gas with the wind inside and outside t he building are also studied. The critical velocity of the wind is proposed to b e an important parameter for studying this effect. The declining angle of the ve locity neutral planes inside and outside the building, and the temperature diffe rences of the hot gas are investigated.