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利用计算流体动力学模拟了传统民居当大门建筑群丘陵地形下选址与自然通风的关系.该模拟包括不同气候与地形下的4个案例及其建筑周边风压与风速分布.模拟结果显示:山体能够降低建筑迎风面和背风面的风压绝对值;在有山体的地形中天井对自然通风的促进效果大于没有山体的地形,对比冬季与夏季天井效果时也可得到同样结论;作为障碍物,山体还能降低建筑周边的风速,且由于冬夏季风向不同,山体的影响程度呈现出较大区别.分析结果表明,丘陵位于建筑北向的选址方式可以解决亚热带气候条件下住宅冬夏2季不同的自然通风需求而造成的矛盾,尤其在含天井的住宅中最为显著.
This paper simulates the relationship between site selection and natural ventilation in the traditional residential buildings under the hilly terrain by using computational fluid dynamics.The simulation includes four cases under different climates and terrain and the wind pressure and wind velocity distribution around the building.The simulation results show that: The mountain can reduce the absolute value of wind pressure on the windward and leeward sides of the building. In the mountainous terrain, the natural ventilation effect of the patio is greater than that of the mountainous terrain. The same conclusion can be obtained when comparing the winter and summer patio effects. , The mountain also can reduce the wind speed around the building, and due to the different wind direction in winter and summer, the influence degree of the mountain shows a big difference.The analysis results show that the location of the hill in the north of the building can solve the difference between the winter and summer residence in subtropical climate Of the natural ventilation needs of the contradictions caused, especially in residential houses with the most significant.