单室墙角火壁面烟熏痕迹特征研究

Research on smoke trace characteristics of corner fire in single room

为研究单室墙角火火灾壁面烟熏痕迹特征,采用1/3尺寸火灾试验还原单室墙角火火灾,测定壁面不同点的温度及烟气蔓延速度,研究火源在不同位置时的壁面烟熏痕迹特征;利用PyroSim软件模拟烟气蔓延过程。结果表明:火源位于房间中间时,在屋顶呈现圆形痕迹;火源在墙角时,两边侧墙和墙角顶部形成明显烟熏痕迹;墙角火在墙角位置的温度和烟气蔓延速度高于房间中间起火;试验结果与模拟结果吻合。试验结果可为调查墙角火火灾提供理论及试验依据。

In order to study the smoke trace characteristics of corner fire in single room,this paper adopts one third size fire experiment to restore the corner fire in the room,measures the temperature of different points on the wall surface and the velocity of smoke spread,and studies the smoke trace characteristics when the fire source was in different positions.PyroSim is used to simulate the smoke spreading process.Results shows that,when the fire source is at the center of the room,a circle trace forms on the ceiling;when the fire source is at the corner,trace forms on both side wall and ceiling corner;the temperature and smoke spreading speed of the corner fire are higher than that of the fire at the center of the room;the experiment and simulation are consistent.The experiment conclusions can provide theoretical and experimental basis for the fire investigation of the corner fire.