基于CFD模拟的绿色高层大跨建筑“形体—风适应”研究  

Research of High-Rise Large-Span Green Buildings“Form—Wind Adaptation”based on CFD Simulation

作　　者：彭旭晖 Peng Xuhui

机构地区：[1]中建五局设计技术科研院

出　　处：《中外建筑》2022年第12期40-44,共5页Chinese & Overseas Architecture

基　　金：中国建筑第五工程局有限公司重大、重点科研课题“高层大跨厂房绿色建筑设计关键技术”(编号:CSCEC-5b-2022-10)。

摘　　要：自然通风是一项重要的绿色建筑被动式技术措施,一方面能降低室内污染物浓度,提高建筑室内舒适度,另一方面能降低空调和机械通风能耗,节能减排。采用基于计算流体力学的PKPM-CFD软件,以高层大跨建筑为建模原型,并连续变化建筑朝向,以长沙地区各个朝向的逐时风况作为输入条件进行自然通风模拟,得出不同朝向的平均换气次数,分析得出,长沙地区最有利于自然通风的朝向为西南向。风向对自然通风会产生很大的影响,风向最好垂直于建筑。影响自然通风的因素是多方面的,应当综合考虑。Natural ventilation is an important passive technical measure for green buildings,on the one hand it can reduce the concentration of indoor pollutions and improve the indoor comfort,on the other hand it can also reduce the energy consumption of air condition and mechanical ventilation,which can save energy and reduce emissions.The PKPM-CFD software based on computational fluid dynamics is used to model a high-rise large-span building as a prototype and continuously vary the building orientation,and the time-by-time wind conditions of each orientation in Changsha area are used as input conditions for natural ventilation simulation,the average number of air changes for different orientations is obtained.It is concluded that the most favorable orientation for natural ventilation in Changsha is southwest.The wind direction will have a great impact on natural ventilation,and the wind direction should preferably be perpendicular to the building.The factors affecting natural ventilation are multiple and should be considered comprehensively.

关 键 词：自然通风 高层大跨 绿色建筑 CFD 逐时风况 

分 类 号：TU834.1[建筑科学—供热、供燃气、通风及空调工程] TU201.5