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【摘要】 国内轨道交通高架车站公共区基本采用自然通风和自然排烟。由于景观要求,车站雨棚多采用封闭拱顶形式,其檐高与拱高对车站自然排烟效果的影响较大。利用CFD模拟了不同拱高和檐高对自然排烟的影响,对比分析了不同雨棚形式下自然排烟的有效性。模拟结果表明,高架车站雨棚设计时,为保证排烟效果,檐高h不应低于2.6m,拱高H的最大值不宜大于檐高的1.5倍。 【Abstract】 There is usually USES natural ventilation and natural smoke extraction in the public area of rail transit elevated station in domestic. And as a result of the landscape request, the canopies use the seal arch form. The canopys h and H have a big effect to natural smoke extraction of elevated station. This article uses CFD to simulate the influence of natural smoke extraction by different high of arch and the eave high, contrastive analysis the validity of different canopy forms in natural smoke extraction. The analogue result indicated that in elevated station canopy design, the value of h cannot be lower than 2.6m, and the maximum value of H is not suitable is bigger than 1.5 times over h. 【关键词】 高架车站; 雨棚; 自然排烟; CFD 【Key words】 Elevated station; canopy; natural smoke extraction; CFD