呼吸墙阻抗-动态流量计算模型

摘要

呼吸墙作为一种新型的建筑室内引风方式得到了广泛关注，其诱导的通风量受风压与热压共同作用决定。为了获得在风压与热压作用下的呼吸墙阻抗与流量特性关系，通过理论关联式分析方法建立了简便的呼吸墙计算模型，并应用计算流体力学（C FD ）对呼吸墙进行了建模仿真，将两类模型的计算结果与实验测试结果进行比较。文中还分析比较了不同辐射热量、风压及多孔填料厚度下，呼吸墙通流阻力及通风量的变化关系。结果表明，关联式与C FD 计算模型具有较好精度，可用于不同结构参数的呼吸墙设计。%As a novel mode to intake outdoor air for room ventilation, breathing w alls have been attracted significant concerns.T he airflow rate induced by a breathing w alldepends on both the therm aland the w ind pressure.T o obtain the causal quantitative relation betw een flow resistance and airflow rate, this investigation established tw o set of m odels in term s oftheoreticalcorrelation analysis and Com putationalFluid D ynam ics (CFD ).B oth m odels can take into account various conditions, such as, different radiation incidence, w ind pressure and porous filtration thickness. In addition, experim ental tests w ere also conducted to obtain data to validate both types of m odels. T he results show that the correlation m odel can provide accurate results that are com parable w ith the CFD m odeling but at m uch low er com putationalcost.Therefore,both m odelscan be applied to aid the design ofbreathing w alls.