Simulation of turbulent flows around a prism in suburban terrain inflow based on random flow generation method simulation
學年 104
學期 1
出版（發表）日期 2015-11-01
作品名稱 Simulation of turbulent flows around a prism in suburban terrain inflow based on random flow generation method simulation
作品名稱（其他語言）
著者 Yi-Chao Li; Chii-Ming Cheng; Yuan-Lung Lo; Fuh-Min Fang; De-qian Zheng
單位
出版者
著錄名稱、卷期、頁數 Journal of Wind Engineering and Industrial Aerodynamics 146, pp.51–58
摘要 In the study, the modified discretizing and synthesizing random flow generation (MDSRFG) was adopted to generate an anisotropic boundary layer inlet for large-eddy simulation. The mean velocity, turbulence intensity and turbulence length scale distributions at inlet, were defined according to the measurements at TKU wind tunnel. The von Kármán model was used as the target spectrum. Wind tunnel pressure measurements on a square prism model with aspect ratio of 3 was used for validation of numerical simulation. Results show that turbulence energy is well maintained from the inlet to the downstream. The relative differences between the measurement and predicted results are 3.4% (mean drag coefficient), 11% (fluctuating drag coefficient), 25.6% (fluctuating side force coefficient) and 4.7% (Strouhal number). The simulated mean and fluctuating pressure distributions showed good agreements with the experiments. The averaged differences between measurement and predicted results are 14.49% (mean pressure coefficient) and 13.74% (fluctuating pressure coefficient). This indicates that the adoption of a reasonable process based on the MDSRFG method is an effective tool to generate a spatially correlated atmospheric boundary layer flow field.
關鍵字 Computational fluid dynamic;Atmospheric boundary layer;Large eddy simulation;Random flow generation
語言 en
ISSN 1872-8197
期刊性質 國外
收錄於 SCI EI
產學合作
通訊作者 Li, Y.C
審稿制度 否
國別 NLD
公開徵稿
出版型式 ,電子版,紙本
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/104637 )