CAJ | 학술논문

基于Fluent软件，利用标准的湍流模型，针对不等高的相邻建筑物建模，下游建筑物完全处于上游建筑物尾流区内，分析了上下游建筑物高度差对上游建筑物尾流区的影响：同一下游建筑高度下，越远离建筑物前沿，风速比越小；在上游建筑物尾流区内，随着下游建筑物高度的升高，风速比的峰值会相应升高。假定进口风速为5 m/s，结合1000 W的小型风机，比较了下游建筑物不同高度下风机的输出功率，可知：当下游建筑物较低时，风机安装位置风速低于启动风速；随着下游建筑高度的升高，输出功率提升。
기우Fluent연건，이용표준적단류모형，침대불등고적상린건축물건모，하유건축물완전처우상유건축물미류구내，분석료상하유건축물고도차대상유건축물미류구적영향：동일하유건축고도하，월원리건축물전연，풍속비월소；재상유건축물미류구내，수착하유건축물고도적승고，풍속비적봉치회상응승고。가정진구풍속위5 m/s，결합1000 W적소형풍궤，비교료하유건축물불동고도하풍궤적수출공솔，가지：당하유건축물교저시，풍궤안장위치풍속저우계동풍속；수착하유건축고도적승고，수출공솔제승。
ABSTRACT:This paper is based on Flunet and the standard k-εturbulence model is used to calculate the wind field around adjacent buildings with different heights. The paper analyzes how the height difference affects the wake area of the upstream building. First,under the same downstream building height, the further from the front of the building,the smaller the wind speed ratio will be. Second,in the wake area of the upstream building,with the increase of the downstream building height, the peaks of the wind speed ratio will rise accordingly. The inlet wind speed is assumed as 5 m/s,the output power of the wind turbine under different downstream building heights are compared based on a small scale wind turbine EW1000. It can be seen that when the downstream building is low,the wind speed where the wind turbine installed is lower than the start-up wind speed;with the increase of altitude,the output power increases.