论文部分内容阅读
采用大涡模拟(LES)方法,以长宽高之比为1.0∶1.0∶0.5的平屋盖建筑为对象,在建筑立面上引入阳台后,对不同风向角下模型表面的风荷载进行了数值模拟计算。通过与风洞试验结果的对比发现,大涡模拟能较好地预测建筑物表面的风压分布。在此基础上,重点探讨了不同风向角下立面阳台对建筑物表面风压和绕流风场的影响,同时考虑了不同来流风场条件的变化对阳台作用效应的影响。研究结果表明,立面阳台的引入会明显改变气流在建筑表面的分离、再附着形式,使得表面风压沿高度方向上的分布发生变化;引起的变化主要集中在建筑物的迎风面,特别是在迎风面最上面一排阳台及其以上区域;随着来流风向角的增加,阳台对建筑迎风面上风压的影响逐渐加大。
The large-eddy simulation (LES) method was used to measure the wind load on the model surface under the different wind direction angles after the balconies were covered by the flat-roofed building with aspect ratio of 1.0: 1.0: 0.5. Simulation calculation. Compared with the wind tunnel test results, it is found that the large eddy simulation can predict the wind pressure distribution on the building surface well. On the basis of this, the influence of facade balconies on building surface wind pressure and wind flow field under different wind angles is discussed emphatically. At the same time, the influence of different wind field conditions on the balcony effect is considered. The results show that the introduction of the balconies will obviously change the separation and reattachment of the airflow on the building surface, which will change the distribution of the surface wind pressure along the height direction. The changes are mainly concentrated on the windward side of the building, especially In the windward surface of the top row of balconies and above the area; with the arrival of the wind angle increases, the balcony on the building windward wind pressure gradually increased.