摘要
利用谐波合成法生成粗网格的脉动风速时程,通过双线性插值得到入口节点时程数据,考虑时程互相关性对时程进行修正得到大涡模拟湍流入口。采用谱元法对两种不同坡度的三维山丘地形进行大涡数值模拟,将结果与风洞试验及有限体积法数值模拟进行对比。结果表明:大涡模拟能较准确地预测山丘地形的风场及湍流特性;与有限体积法相比,谱元法的计算效率更高,在复杂山地地形的风场预测上有较好的应用前景。
The harmonic synthesis method was applied to generate fluctuating wind velocity for coarse grids. Turbulent inlet for large eddy simulation (LES) was calculated by bilinear interpolation and cross-correlation modification. The spectral element method (SEM) was introduced to simulate two kinds of three-dimensional hills by LES. The results were compared to the wind-tunnel tests and finite volume method (FVM) numerical simulation. It was found that LES can accurately predict the wind speed distribution and turbulence characteristics of hilly terrain. Compared to FVM, SEM is more efficient and its applications in the fields of wind fields prediction for complex terrain is promising.
作者
胡伟成
杨庆山
张建
HU Wei-cheng;YANG Qing-shan;ZHANG Jian(Department of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Department of Civil Engineering,Chongqing University,Chongqing 400044,China;Beijing’s Key Laboratory of Structural Wind Engineering and Urban Wind Environment,Beijing 100044,China)
出处
《工程力学》
EI
CSCD
北大核心
2019年第4期72-79,共8页
Engineering Mechanics
基金
国家自然科学基金国际(地区)合作与交流项目(51720105005)
关键词
谐波合成法
湍流入口
谱元法
有限体积法
三维山丘地形
风洞试验
Harmonic synthesis method
turbulent inlet
spectral element method
finite volume method
three-dimensional hills
wind-tunnel test
