التفاصيل البيبلوغرافية
| العنوان: |
Space and time organization in a shock-induced separated boundary layer. |
| المؤلفون: |
P. DUPONT, C. HADDAD, J. F. DEBIÈVE |
| المصدر: |
Journal of Fluid Mechanics; Jul2006, Vol. 559 Issue 1, p255-277, 23p |
| مصطلحات موضوعية: |
TURBULENT boundary layer, SHOCK waves, MECHANICAL shock, MACH number, TURBULENCE |
| مستخلص: |
The interaction of an oblique shock wave impinging on a turbulent boundary layer at Mach number 2.3 is experimentally investigated for a wide range of shock intensities. Characteristic time and length scales of the unsteady reflected shock and inside the downstream interaction region are obtained and compared with already existing results obtained in compression ramp experiments as well as in subsonic detached flows. Dimensionless characteristic frequencies are highlighted to characterize low-frequency shock unsteadiness as well as the different large scales which develop inside the initial part of the interaction. The possibility of describing the spatial development of the large scales inside the interaction zone using a mixing-layer scheme including compressibility effects is tested for a wide range of Mach numbers, shock intensities and geometrical configurations. Moreover, strong evidence of a statistical link between low-frequency shock movements and the downstream interaction is given. Finally, the downstream evolution of the structures shed into the boundary layer is characterized and shows features specific of our configuration. [ABSTRACT FROM AUTHOR] |
|
Copyright of Journal of Fluid Mechanics is the property of Cambridge University Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
