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目前,高层建筑台风风场实测的主要方法是在其顶部上架设风速仪获得相关数据,但高层建筑物顶部的风场将受到其本身的影响,而且其影响程度会随着风速仪架设的位置和来流方向的不同而发生变化。通过数值模拟和风洞试验模拟实测时的边界层风场,分析高层建筑对周边风场的影响,对比风向角变化时建筑物顶面风场在两种方式的吻合情况。研究得出建筑物顶面的风速随高度增加影响逐渐减小,确定了高层建筑风场实测时风速仪架设的高度和最佳位置。通过谱合成法生成入口条件,进行大涡模拟并研究了高层建筑对于本身风场的影响及与未受干扰的来流风场之间差别,为相似建筑的现场实测提供参考。
At present, the main method for measuring the typhoon wind field in high-rise buildings is to obtain the relevant data on the top of the typhoon wind field. However, the wind field at the top of a high-rise building will be affected by itself and its influence will vary with the location of the anemometer And the direction of the flow changes. Through the numerical simulation and wind tunnel test, the boundary layer wind field is simulated to analyze the influence of high-rise building on the surrounding wind field. Contrasting the top wind field of the building when the wind direction angle changes, the two methods are consistent. The study shows that the wind speed on the top of the building decreases gradually with the increase of height, and the height and the best position of the anemometer set during the actual wind measurement of tall buildings are determined. The inlet conditions were generated by spectral synthesis, large eddy simulation was carried out, and the difference between high-rise building on its own wind field and undisturbed wind flow field was studied to provide reference for the field measurement of similar buildings.