CAJ | 학술논문

根据广州下垫面类型和湿热气候特征，选取广州大学城一个小区为试验基地，在典型的晴朗天气条件下，通过实地观测和微尺度数值模式 ENVI-met，探讨该地区的微气候特征。数值模式能较好地模拟温度、湿度及流场的空间分布和时间变化特征，结果显示：①模拟区域内不同的下垫面存在高温低湿、低温高湿的现象；②毗邻两栋建筑之间可形成狭管流效应，风速值约为来流风速的1.4～1.7倍；③单体方形建筑物两侧出现角隅大风，阵风风速可达平均风速的2～3倍；④街谷型建筑之间有微弱的街谷涡旋形成，其强度与街谷的几何配置和来流风向有关。
근거엄주하점면류형화습열기후특정，선취엄주대학성일개소구위시험기지，재전형적청랑천기조건하，통과실지관측화미척도수치모식 ENVI-met，탐토해지구적미기후특정。수치모식능교호지모의온도、습도급류장적공간분포화시간변화특정，결과현시：①모의구역내불동적하점면존재고온저습、저온고습적현상；②비린량동건축지간가형성협관류효응，풍속치약위래류풍속적1.4～1.7배；③단체방형건축물량측출현각우대풍，진풍풍속가체평균풍속적2～3배；④가곡형건축지간유미약적가곡와선형성，기강도여가곡적궤하배치화래류풍향유관。
Based on the hot and humid climate and the underlying surface of Guangzhou,taking a typical community in Guangzhou Higher Education Mega Center as the test site,we analyze the microclimate characteristics over this area by meteorological observational data and a numerical model ENVI-met under typical sunny weather condition.The results indicate that the ENVI-met model can successfully simulate the special distribution and temporal evolution of temperature,humidity and flow field.① There exist high temperature and low humidity,low temperature and high humidity over the different surfaces.②Channeling effect can be found between the Adjoining Buildings,and the wind speed will become 1.4 to 1.7 times of the upper stream.③ The corner flow can take place on two sides of the Single Building,and wind gust may be two to three times of the average wind speed.④ There exists vortex between the Street Canyon Buildings.This effect is connected with the aspect ratio and the approach flow.This study helps us better understand some microclimate phenomenon in the area under sunny weather condition,which may play an important role in pedestrian comfort and diffusion of air pollutants,and can represent the fea-tures of hot and humid area.The research has practical significance for the city planning in the region with similar microclimate characteristics.