沈阳商业中心区多尺度温度变化研究

Multi-scale Temperature Change in Shenyang Commercial Center

为了比较不同尺度城市形态要素对局部温度的影响,以沈阳太原街商业区为例,模拟了其典型夏季条件下的热环境。结果表明,在局部日照、对流与周边环境温度差异的共同影响下,同一时刻研究区域内的最大温差可达2.68℃,建设强度相同的地块单元平均温度依然相差0.56℃。建筑附近因日照产生的温差仅为0.16~0.33℃,因空气对流产生的温差为0.32~0.72℃,两种因素共同作用下的温差可达0.65~0.88℃。局部温度既受周围城市建设强度的影响,又与微观的对流及日照因素有关,且对流因素产生的温差更大。

To compare the influence of urban form in different scale on local air temperature,Taiyuan Business District in Shenyang is analyzed through numerical simulation.Results show that variation of air temperature in the district is recorded by 2.68℃with the influence of local solar radiation,air convection and ambient temperature difference.Average temperature of plot units with same construction intensity still differed by 0.56℃.Temperature difference around buildings caused by solar radiation only recorded 0.16~0.33℃,but 0.32~0.72℃by convection,and 0.65~0.88℃by the combined effect.Local temperature is not only influenced by the intensity of surrounding urban construction,but also related to the convection and radiation factors in microscale,and the air convection causes a larger temperature difference.