广东区域通风廊道识别初探

A Study on Regional Ventilation Corridor in Guangdong

以广东省为例,通过绘制空气动力学粗糙长度,从动力学角度初步识别出通风潜力;利用数值模拟输出的冬夏季平均水平风场,结合近地面温度和粗糙长度加权后得到通风指数,发现城际尺度风道分布受季节热力差异影响,冬季通风能力显著优于夏季。将通风评价结果划分为4个等级,从广东全域尺度分冬、夏两季识别了潜在风道。

The present study aimed to identify the natural ventilation potential in Guangdong Province by employing the concept of roughness length from the perspective of aerodynamics.A ventilation index was derived using numerically simulated average horizontal wind field data in winter and summer,and the weighted combination of near-surface temperature and roughness length.It was found that the distribution of inter-city ventilation corridors is affected by seasonal thermal differences,with significantly better ventilation capacity in winter compared to summer.The ventilation evaluation results were categorized into four grades,and potential ventilation corridors were identified for winter and summer in Guangdong.