曲线隧道内烟气扩散特性模拟研究

发布时间：2018-04-17 18:11

本文选题：曲线隧道 + 烟气扩散　；参考：《消防科学与技术》2017年02期

【摘要】：通过FDS数值模拟对70、150、200、250、300、400m等不同半径及5、30 MW两种火源功率下曲线隧道内烟气的扩散规律进行研究,并与平直隧道内烟气的扩散特性进行对比。研究结果表明:曲线隧道内横断面上的烟气温度分布沿隧道中心线不是对称分布,隧道外侧烟气的扩散明显快于内侧;曲线隧道内距地面3m以上区域内温度沿长度方向的变化趋势与直线隧道相同,随着距火源距离的增加而逐渐降低,但在距地面较低处,烟气温度沿长度方向上的分布趋势是先升高后降低,在弯道部位出现局部高温。
[Abstract]:The diffusion characteristics of flue gas in a curved tunnel with different radius of 70150200250300400m and power of 530MW were studied by FDS numerical simulation, and compared with that in a straight tunnel.The results show that the distribution of flue gas temperature on the cross section of the curved tunnel is not symmetrical along the center line of the tunnel, and the smoke diffusion on the outside of the tunnel is obviously faster than that on the inside.The variation trend of the temperature along the length direction of the curve tunnel above 3m from the ground is the same as that of the straight tunnel, and decreases gradually with the increase of the distance from the fire source, but at the lower part of the ground,The distribution trend of flue gas temperature along the length direction is that the flue gas temperature rises first and then decreases, and the local high temperature appears in the bend.
【作者单位】：北京工业大学建筑工程学院;天津市市政工程设计研究院;北京工业大学北京城市交通协同创新中心;
【基金】：国家自然科学基金资助项目(51278018、51378040) 北京市自然科学基金-北京市科学技术研究院联合资助项目(L140002)
【分类号】：U458

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