建筑间锅炉排烟扩散模拟与改善

Numerical Simulation on the Smoke Diffusion from Chimney among Buildings and Its Controls

本文建立了由四栋建筑和其间的锅炉烟囱组成的小区的三维模型,以计算流体动力学的方法模拟计算了两种风向条件下,该烟囱排烟在建筑间的扩散情况。结果显示,烟囱排烟对临近建筑可能造成严重污染。当新建建筑位于烟囱下风侧时,高层建筑的高层部分受污染的程度非常严重,气体污染物能够沿建筑壁面向上爬升至顶层。然而,根据污染物的扩散情况,调整建筑布局可以改善新建建筑物周围的空气质量。本实例中通过改变新建建筑物与烟囱的相对位置,使得建筑附近的污染物浓度大幅度下降。

A three-dimensional model consisting of four buildings and a chimney was established, and the smoke diffusion from chimney pollutants in east and west wind conditions was calculated with computational fluid dynamics. The results show that the flue from chimney may pollute its neighbor buildings. When a new high-rise building is located at the downstream of a chimney, the residents at the top part of the building will suffer because the gaseous pollutant can rise to the top along walls. Even so, the air quality would be improved by adjusting the building layout. In this case, it is observed that the pollution around the new high-rise building has been mitigated after changing the relative position of the building and the chimney.