CAJ | 학술논문

针对城市环境下的大气污染物扩散问题，采用Google SketchUp ，从Google Earth地图中提取建筑物高程、经纬度等地理位置信息，建立城市三维模型。基于湍流理论和气体运动方程，模拟污染物在城市环境中的扩散演化过程，重点讨论了污染物扩散的运动规律及危险区域的变化。实验结果说明，污染物浓度一般集中在泄漏口的下方向，高浓度污染区呈现为狭长的椭圆区域，并随时间逐步扩大，但经过较长时间的扩散高浓度污染区趋于稳定。根据污染物扩散数值模拟结果，结合Google Earth地图绘制了污染物扩散危险区域图，为相关部门制定事故应急决策提供参考。
침대성시배경하적대기오염물확산문제，채용Google SketchUp ，종Google Earth지도중제취건축물고정、경위도등지리위치신식，건립성시삼유모형。기우단류이론화기체운동방정，모의오염물재성시배경중적확산연화과정，중점토론료오염물확산적운동규률급위험구역적변화。실험결과설명，오염물농도일반집중재설루구적하방향，고농도오염구정현위협장적타원구역，병수시간축보확대，단경과교장시간적확산고농도오염구추우은정。근거오염물확산수치모의결과，결합Google Earth지도회제료오염물확산위험구역도，위상관부문제정사고응급결책제공삼고。
To study urban air pollution diffusion ,3D model of city geography is made by utilizing Google SketchUp to ex-tract the maps of the building elevation and latitude and longitude from Google Earth .The flow field and pollutant diffusion in urban areas are researched by numerical simulation with Fluent according to the turbulence theory and the gas equation of motion and the evolutionary regularity of air pollution diffusion and the danger zone are also discussed based on the simula-tion results .The simulation results show that the pollution concentrates below the leakage .The high concentration of gas zone presents to be a long and narrow elliptic area and expands over time ,but after a long time it tends to be stable .Based on air pollution concentrate distribution ,maps of danger zone are made in the urban maps from Google Earth ,which can be useful to make emergency decisions .