高精度・保存的流体計算法の耐風問題への適用性について : その4 乱流境界層中での変動風圧力特性に関する風洞実験値との比較

概要

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Concerning the wind resistant problems and environmental problems for buildings and structures, we have to consider the effect of turbulence characteristics. Therefore, it is important to give a velocity profile and turbulence intensity similar to natural wind to the approaching flow conditions for numerical simulations as well as wind tunnel experiments. So, we proposed a method of generating turbulent boundary layer on the preceding paper. In this study, we carry out direct numerical simulation (DNS) and wind tunnel test of the flow and pressure around a 3D square cylinder for three types of approaching flow (uniform flow and two turbulent boundary layers), and we compare the flows and aerodynamic characteristics obtained by DNS with those by the wind tunnel test. Especially, we pursue the turbulence effects on the fluctuating components of pressure on a 3D square cylinder, even for the fluctuating pressure spectra and correlation.
社団法人日本建築学会の論文
2006-07-30