基于大涡模拟的大气边界层全尺寸风场研究  

Research of Full-size Wind Field of Atmospheric Boundary Layer Based on Large Eddy Simulation

作　　者：鲍泽辰 张克跃[2] 张继业[3] 

机构地区：[1]西南交通大学力学与工程学院,四川成都610031 [2]西南交通大学土木工程系,四川峨眉614202 [3]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《公路交通科技》2015年第5期95-101,共7页Journal of Highway and Transportation Research and Development

基　　金：国家自然基金项目(51308465)

摘　　要：为了研究大气边界层脉动风场的数值模拟方法,通过在全尺寸风场模型中布置粗糙元、扰流杆和格栅等构造措施,生成了理想的随机脉动风。对影响数值模拟结果的粗糙元高度、扰流杆间距和格栅布置情况等主要参数进行了分析,确定了其影响规律。然后,以C类地貌大气边界层风场为例,提出了相应的数值模型组合方法。结果表明:该模拟结果满足结构抗风计算的要求,实现了对边界层转捩的全过程模拟,为后续进行结构绕流的大涡模拟提供了有价值的来流生成方法。In order to study the numerical simulation method of the fluctuating wind field of atmospheric boundary layer, we generated the ideal random fluctuating wind through arranging the structural measures such as roughness element, spoiler lever and grille in the full-size wind field model. We analyzed some main parameters which affect the numerical simulation result, such as height of roughness element, spacing of spoiler lever and arrangement of grille, and confirmed the effect rule. Then, we proposed a corresponding combination method of the numerical model through an example of the wind field of Class C landscapes atmospheric boundary layer. The result shows that the simulation result meets the calculation requirements of wind resistance structure, it achieved a full process simulation of the boundary layer transition, which provided a valuable stream generation method for subsequent large-eddy simulation of flow around the structure.

关 键 词：桥梁工程 抗风 大涡模拟 大气边界层 全尺寸风场 预先模拟法 粗糙元 

分 类 号：P425[天文地球—大气科学及气象学]