深圳大运体育中心行人风环境的大涡模拟

Large Eddy Simulations and Evaluation of Pedestrian Wind Environment around the Shenzhen Universiade Stadiums

建筑群附近风环境的品质,直接影响地面行人的舒适与安全。以深圳大运体育中心主要建筑为工程对象,采用一种新的湍流脉动流场生成方法(discretizing and synthesizing random flow generation,DSRFG)模拟风场的实际湍流边界条件,基于数值模拟计算软件Fluent,对深圳大运会体育场馆为中心10 km范围内的山体和主要建筑物进行全尺寸大涡模拟计算,得到各风向角下体育中心速度场分布。结合当地气象资料,采用超越阈值概率法对体育场馆周围场地行人风环境进行预测与评估,并对风环境较差地区的成因进行分析并提供改良建议。结果表明:该研究方法可以较准确地预测出建筑群周围风环境分布,并为类似体育场馆设计的合理性以及行人风环境的研究与优化提供有价值的参考。

Wind environment of building group would affect the pedestrian comfort and safety of pedestrians.Shenzhen Universiade Stadiums was taken as an engineering example.A new turbulent inflow generator named the discretizing and synthesizing random flow generation(DSRFG)was used to simulate the actual turbulent boundary.Based on the numerical simulation software FLUENT,the full-size large eddy simulation calculation was carried out for mountains and main buildings within 10 kilometers of the stadium.The velocity field distribution of sports center under different wind directions was obtained.The pedestrian wind environment was assessed using the threshold exceedance probability approach combined with local meteorological data.The cause of formation in the area with bad wind environment was analyzed.The results show that the wind environment distribution around the building complex can be predicted accurately with DSRFG.The results provide a valuable reference for similar stadiums designing and research and optimization of pedestrian wind environment.