@inproceedings{oai:jaxa.repo.nii.ac.jp:00037877,
 author = {村田, 喜昭 and 小原, 哲郎 and 大八木, 重治 and Murata, Yoshiaki and Obara, Tetsuro and Oyagi, Shigeharu},
 book = {航空宇宙技術研究所特別資料, Special Publication of National Aerospace Laboratory},
 month = {Dec},
 note = {後ろ向きステップ領域を伝播する衝撃波と密度界面との干渉の数値シミュレーションを行った。陽的な予測子･修正子TVDスキームを用いて時間依存オイラー方程式を解く。流れ場は、第2の気体で満された後ろ向きステップ領域と、その上の第1の気体で満された領域とから成り、第1の気体の中を伝播する衝撃波が後ろ向きステップを通過し密度の異なる2つの気体の界面と干渉する。界面に関して2つの場合、すなわちslow/fastとfast/slowとを考察した。計算のパラメタとしては2つの気体の密度比と衝撃波マッハ数を選んだ。slow/fast干渉の場合、軽い気体の中で衝撃波は伝播速度が大きくなり、衝撃波の背後では大きな渦が生じて2つの気体を混合させる。fast/slow干渉の場合は、重い気体の中で衝撃波は斜めとなり、その角度は密度比により定まり、界面はslow/fastの場合に比べ安定している。, Interactions of the planar shock wave propagating along a backward-facing step region with a density interface are simulated numerically. The time-dependent solutions of the Euler equations were obtained by using a explicit predictor-corrector Total Variation Diminishing (TVD) scheme. A flow field consists of two regions, one is the backward-facing step region filled with gas-2, the other is the region filled with gas-1 above it. A planar shock propagating in gas-1 propagates along the backward-facing step and interacts with the interface separating these two gases with different densities. Two general cases of interface are considered, which are called as a slow/fast interface and a fast/slow interface. As parameters of calculations, a density ratio of two gases and a shock Mach number were selected. In the case of slow/fast interaction, a shock transmitted in a light gas propagates with higher propagation velocity and, behind the shock, a large vortex is created which mixes two gases. For the fast/slow interactions, a shock transmitted in a heavy gas forms an oblique shock wave whose angle is determined by the density ratio and the interface is more stable in comparison with slow/fast interaction., 資料番号: AA0004174040, レポート番号: NAL SP-27},
 pages = {273--278},
 publisher = {航空宇宙技術研究所, National Aerospace Laboratory (NAL)},
 title = {密度界面と衝撃波の干渉過程のシミュレーション},
 volume = {27},
 year = {1994}
}