Shock waves in nonuniform gas
| العنوان: | Shock waves in nonuniform gas |
|---|---|
| المؤلفون: | Masatoshi Yuhi, Yoshikuni Umeda, Natsuo Hatta, Ryuji Ishii, Hitoshi Fujimoto |
| المصدر: | Scopus-Elsevier |
| بيانات النشر: | AIP Publishing, 1999. |
| سنة النشر: | 1999 |
| مصطلحات موضوعية: | Fluid Flow and Transfer Processes, Physics, Shock wave, Mach reflection, Mechanical Engineering, Computational Mechanics, Stratified flows, Mechanics, Condensed Matter Physics, Mach wave, Moving shock, Physics::Fluid Dynamics, symbols.namesake, Classical mechanics, Mechanics of Materials, symbols, Oblique shock, Normal shock tables, Stratified flow |
| الوصف: | Shock waves propagating through a stratified gas are investigated numerically and analytically. A shock wave is produced by a piston that begins to move from rest abruptly at some constant velocity in a two-dimensional horizontal duct. Initially the gas in the duct has a temperature or density distribution only along the vertical axis at a constant pressure. The initial density distribution, which is assumed to change monotonically, has a zero spatial gradient at the upper and lower walls and then has a single inflection point. It is confirmed that at least three types of shock patterns can be realized asymptotically. The first is a single curved shock, the second is a shock with a Mach stem (Mach reflection), and the last is a shock with a reflected branch (regular reflection). The first is substantially steady but the latter two are essentially unsteady. The time evolution of the induced flow field is investigated in detail. Based on this information, an analytical solution for the substantially steady curved shock is obtained in the coordinate system fixed on the shock. The shock profile as well as the induced flow field is investigated in detail with this solution. It is shown that the analytical results can predict quite well the numerical results. Finally, the flow instability of this shock-induced flow is investigated, because the induced flow has a nonuniform horizontal velocity distribution along the vertical axis at a constant pressure. |
| تدمد: | 1089-7666 1070-6631 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d4d1f5a2bf3a71fd9306c2d2a89fb17 https://doi.org/10.1063/1.870054 |
| رقم الأكسشن: | edsair.doi.dedup.....1d4d1f5a2bf3a71fd9306c2d2a89fb17 |
| قاعدة البيانات: | OpenAIRE |
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