Experimental and Numerical Study on Three-dimensional Structures of Unsteady Turbulent Flowfields affecting wind environment around buildings

本研究从建筑物周围居住空间环境设计的角度，采用风洞试验和数值模拟相结合的方法，对建筑物周围湍流流场的三维结构进行了研究；在风洞试验中，研制了可测量144个不同点处瞬时速度的多通道风速计系统，测量了最大风速、阵风和峰值因子的分布；另一方面，通过将数值模拟结果与风洞试验结果进行比较，提高了基于大涡模拟的数值模拟的精度。利用风洞试验数据和数值模拟结果，对三维湍流结构与建筑物附近强风的关系进行了较为精确的研究。本研究为建筑周围风环境设计提供了许多有益的结果。

In this study, three-dimensional structure of turbulent flowfields around buildings were investigated by using the wind tunnel tests and the numerical simulation from the view point of the environmental design for outdoor living space around buildings.In wind tunnel tests, the multi-channel anemometer system, which can measure instantaneous velocity at 144 different points were developed and distributions of maximum velocities, gust and peak factors were measured by this method.On the other hand, the accuracy of numerical simulation based on Large Eddy Simulation was improved by comparing the numerical results with those from wind tunnel tests. The relation between three-dimensional turbulent structure, and strong gusts near buildings were examined precisely using the data obtained from wind tunnel tests and the numerical simulation. Many useful results for wind environmental design around buildings were given throughout this study.