Tokyo University of Agriculture and Technology Graduate School
Tokyo University of Agriculture and Technology Department of Mechanical Systems Engineering, Faculty of Technology
Tokyo University of Agriculture and Technology Department of Mechanical Systems Engineering, Faculty of Technology
National Aerospace Laboratory Computational Sciences Division
National Aerospace Laboratory Computational Sciences Division
出版者
航空宇宙技術研究所
出版者（英）
National Aerospace Laboratory (NAL)
雑誌名
航空宇宙技術研究所特別資料
雑誌名(英)
Special Publication of National Aerospace Laboratory
巻
30
ページ
75 - 80
発行年
1996-01
会議概要（会議名, 開催地, 会期, 主催者等）
航空宇宙技術研究所 7-9 Jun. 1995 東京 日本
会議概要（会議名, 開催地, 会期, 主催者等）（英）
National Aerospace Laboratory 7-9 Jun. 1995 Tokyo Japan
Supersonic internal flows with a cavity are numerically investigated. In the present study, the two-dimensional Navier-Stokes equations are solved by using the Chakravarthy-Osher TVD (Total Variation Diminishing) scheme. The VLES (Very Large Eddy Simulation) is executed to capture the flow field in detail. In the present results, the unsteady behavior of the vortices in the cavity, such as their appearance, disappearance and oscillation, and their interaction with shock waves or shear layer is clearly shown. The overall character of the flow field was clearly shown by the computation on coarse grids. The result of the computation on fine grids is that; not only large-scale vortices which had been shown on coarse grids, but also small unsteady vortices in the shear layer, were recognized. The periods of the large-scale vortices and the small vortices are in agreement with those in experiments. Since it is difficult to observe the complicated flow structure inside the cavity experimentally, the numerical simulation is useful for the investigation of this problem.
キャビティを有する非定常超音速内部流の数値シミュレーション
nalsp0030014.pdf
(914.5KB)
