基于CFD的大空间建筑自然通风优化设计  被引量:2

CFD-based Optimization Design of Natural Ventilation for Large Space Buildings

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作  者:贾芳芳 JIA Fang-fang(Pingliang Architectural Survey and Design Institute Co,Ltd,Pingliang 744000,China)

机构地区:[1]平凉市建筑勘察设计院有限责任公司,平凉744000

出  处:《建材世界》2023年第2期104-107,共4页The World of Building Materials

摘  要:为解决大空间建筑物内部空气流通问题,以甘肃省兰州市大跨度大空间展览厅为研究对象,运用有限元体积法数值模拟软件建立三维空间模型,考虑进排风口高差、进风温度和室内热源3个重要参数对自然通风效果的影响。结果表明,进排风口高差与建筑高差比值m、进排风口面积与地面面积比值r均会对建筑热压通风换气次数产生显著影响;随着进风温度的增加,所有工况下的热压通风换气量曲线均呈近线形增加,排风口面积、进风温度对热压通风换气量影响显著,而进风口面积对热压通风换气量的影响较小;随着室内热源强度的增加,所有工况下的热压通风换气量曲线均变化不大。排风口面积对热压通风换气量影响显著,而进风口面积、室内热源强度对热压通风换气量的影响较小。In order to solve the problem of internal air circulation in large space buildings,taking the large-span and large-space exhibition hall in a city in Gansu Province as the research object,the three-dimensional space model was established by using the finite element volume method numerical simulation software,taking into account the influence of three important parameters,namely,the height difference between the inlet and outlet,the inlet temperature and the indoor heat source,on the natural ventilation effect.The results show that the ratio of the height difference between the air inlet and the air outlet to the building height difference m,and the ratio of the air inlet and the air outlet area to the ground area r will have a significant impact on the air change times of the building's thermal pressure ventilation;With the increase of air inlet temperature,the heat pressure ventilation volume curve under all working conditions increases nearly linearly.The exhaust area and air inlet temperature have a significant impact on the heat pressure ventilation volume,while the air inlet area has a small impact on the heat pressure ventilation volume;With the increase of indoor heat source intensity,the heat pressure ventilation volume curve under all working conditions has little change.The area of exhaust outlet has a significant impact on the heat pressure ventilation,while the area of air inlet and the intensity of indoor heat source have a small impact on the heat pressure ventilation.

关 键 词:建筑自然通风 大空间建筑 空气湍流 计算流体动力学(CFD) 

分 类 号:TU834.1[建筑科学—供热、供燃气、通风及空调工程]

 

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