夏热冬暖地区下沉广场对地下综合交通枢纽通风性能的影响
Influence of sunken squares on ventilation of underground comprehensive transportation hubs in hot summer and warm winter zone
摘要：
对夏热冬暖地区有下沉广场的地下综合交通枢纽冬夏两季空调运行工况进行了CFD模拟，得到了冬夏季典型工况各层主要截面的风速场和下沉广场设置所导致的进出风情况，并基于准静风区、换气次数等概念对其进行了分析。结果显示：夏季工况下沉广场进出风呈现“一进三出”的特点，冬季工况呈现“两进两出”的特点；由于玻璃幕墙的设置，在玻璃幕墙内形成了明显的空气流道；室外风向变化与下沉广场设置情况、开口面积、内部结构共同作用影响建筑通风性能，并且室外气流更容易通过开口方向与风向相同、开口面积较大、内部无大量隔断墙等结构的下沉广场进入室内。
Abstract：
The air conditioning operating conditions of the underground comprehensive transportation hub with the sunken square are simulated by CFD in hot summer and warm winter zone in winter and summer, and the distribution of the wind speed of the main cross-section of each floor and the wind in and out caused by the setting of the sunken square under typical winter and summer conditions are obtained and analysed based on the concepts of quasi-quiet wind area and air change rates. The results show that the wind entering and exiting the sunken square presents the characteristics of “one in and three out” under the summer condition and “two in and two out” under the winter condition. Due to the installation of the glass curtain wall, there is an obvious air flow path in the glass curtain wall. The ventilation performance of the building is affected by the change of outdoor wind direction, the setting of the sunken square, the opening area and the internal structure, and the outdoor air is easier to enter the indoor through the sunken square whose opening direction is the same as the wind direction, with large opening area and no large number of internal partition walls.
Keywords:sunkensquare;undergroundcomprehensivetransportationhub;ventilation;hotsummerandwarmwinterzone;quasi-quietwindarea;airchangerate;windspeed;CFDsimulation