@inproceedings{oai:jaxa.repo.nii.ac.jp:00004758, author = {嶋, 英志 and 北村, 圭一 and Shima, Eiji and Kitamura, Keiichi}, book = {宇宙航空研究開発機構特別資料: 第42回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2010 論文集, JAXA Special Publication: Proceedings of 42nd Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2010}, month = {Feb}, note = {第42回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2010 (2010年6月24日-25日. 米子コンベンションセンター BiG SHiP), 42nd Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2010 (June 24-25, 2010. Yonago Convention Center BiG SHiP), Yonago, Tottori Japan, This paper presents a numerical flux function of compressible CFD methods for all speeds that can be used from very low Mach numbers to very high Mach numbers. For the low Mach number limit, it is known that excessive numerical error degrades both the solution and the convergence rate. In this study, such problems are fixed by controlling numerical dissipation contained in the pressure term of AUSM-family schemes. For the high Mach number limit, on the other hand, there are crucial problems remained unsolved at a shock front, such as the carbuncle phenomenon. It is shown that the stability strongly depends on the formulation of the mass flux function in AUSM-family schemes. The new scheme, named SD-SLAU (Shock Detecting SLAU), switches the pressure difference term in the mass flux scheme using a shock detecting function in a way that the new scheme can readily be applied to unstructured grids. This scheme provides proper amount of dissipation into both normal and tangential directions to the captured shock in our tests: In particular, numerical noises ("wiggles") behind the shock are eliminated., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA0064967051, レポート番号: JAXA-SP-10-012}, publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)}, title = {全速度数値流束スキームの改良について}, volume = {JAXA-SP-10-012}, year = {2011} }