超高层建筑通风走廊对新排风系统的作用

Effect of ventilation corridor on outdoor air and exhaust systems for super high-rise buildings

采用CFD方法模拟分析了室外风速较小和很大两种情况下有、无通风走廊时超高层建筑周围的气流速度分布、气流压力分布和新排风口静压值。结果显示,通风走廊的设置对改善新排风系统的运行状况有一定的作用,但其作用不能过分夸大;在室外风速较小的地方,即使在超高层建筑的上部,风速也不大,一般不需设置通风走廊就可以使新排风系统正常运行;对于室外风速很大的地区,即使设置了通风走廊,也要注意新排风口位置的选择。

Simulates and analyses air velocity and pressure distribution around super high-rise buildings, as well as the static pressure values at outdoor air inlets and air exhaust outlets, with and without ventilation corridor under the two conditions of a lower and a high outdoor wind velocities using CFD method. The results show that the ventilation corridor has some effect on the outdoor air and exhaust systems, but its effect should not be overestimated. In the area with lower outdoor wind speed, the wind speed at high level of the building is still not very high. In this case, even without ventilation corridor, the outdoor air and exhaust systems can still works properly. In the area with high outdoor wind speed, the locations of outdoor air inlets and air exhaust outlets still needs to be carefully considered even with ventilation corridors.