建筑外表面对流换热系数的CFD模拟研究

建筑外表面的对流换热系数是建筑节能和城市环境模拟的重要参数。本文首先通过CFD模拟结果与萘升华技术法的实测结果进行比较，验证了CFD模拟技术在建筑外表面对流换热系数研究中的可适用性，然后利用CFD计算模型进行模拟仿真，发现建筑外表面对流换热系数受到风速、风向、建筑密度及周围建筑高度的强烈影响，并初步得到了不同建筑工况及气象条件下建筑外表面对流换热系数的分布规律。

Numerical Studies On The Convective Heat Transfer Coefficient On The External Surfaces Of Buildings

The convective heat transfer coefficient on the external surface of buildings is an important parameter for accurately calculating thermal load of building and simulating airflow around the building. In this paper, the applicability of CFD in this study is validated by comparsion between the results from the CFD and the field measurement using the naphthalene sublimation technique on the external surface of the building. Then the distribution law of the convective heat transfer coefficient on the walls is studied by CFD calculation under different building cases and weather conditions.