2026-03-11T10:58:52Z https://jaxa.repo.nii.ac.jp/oai

oai:jaxa.repo.nii.ac.jp:00043199 2023-06-20T22:20:31Z 1887:1893 1896:1898:1913:1915

乱流数値実験における境界条件の影響 Effects of Boundary Conditions in Numerical Experiments For Turbulent Flows 小林, 敏雄 鬼頭, 幸三 Kobayashi, Toshio Kitoh, Kozo With the increase of computer speed and capacity, the numerical prediction method, which has been developed mainly in the field of aircraft technology, is gradually being applied to automotive aerodynamics. However, the large wake behind a road vehicle necessitates more elaborate computational techniques for the selection of turbulence model, boundary condition, etc. In this paper, the effects of boundary conditions on the numerical turbulent flow around a road vehicle are preliminarily analyzed using the finite difference mthod and the kappa - epsilon turbulence model. It is found from the calculations that the stability and behavior of numerical solution depends strongly on the boundary conditions of turbulence energy and dissipation ratio. 資料番号: NALSP0005019 レポート番号: NAL SP-5 航空宇宙技術研究所 National Aerospace Laboratory(NAL) 1985-11 jpn technical report https://jaxa.repo.nii.ac.jp/records/43199 0289-260X AN10097345 航空宇宙技術研究所特別資料 Special Publication of National Aerospace Laboratory SP-5 5 147 152 https://jaxa.repo.nii.ac.jp/record/43199/files/nalsp0005019.pdf application/pdf 348.6 kB 2020-01-28