Turbulent Structure of Supersonic Flowfield with Transverse Injection
| Autor: | Toshinori Kouchi, Shohei Uramoto, Goro Masuya |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics velocity fluctuation Spatial correlation Technology stereoscopic particle image velocimetry Science (General) business.industry Turbulence Mechanical Engineering Structure (category theory) Mechanics Stereoscopic particle image velocimetry jet in supersonic crossflow Transverse plane spatial correlation Q1-390 Optics Supersonic speed business |
| Zdroj: | Journal of Fluid Science and Technology, Vol 7, Iss 2, Pp 231-241 (2012) |
| ISSN: | 1880-5558 |
| Popis: | We investigated a supersonic flowfield with transverse injection of air or helium by stereoscopic particle image velocimetry and calculated single-time two-point spatial correlations of velocity fluctuations. For both injection gases, the bow shock wave formed by the injection and its reflection from the upper wall could be seen in the mean velocity distribution. In the velocity fluctuation intensity distribution, we observed vibrating counter-rotating vortex pair and the Reynolds stress was formed along the track of the maximum mean velocity gradient. Correlations showed the scale structure of turbulence and the shapes of the correlation region changed with the selected velocity component. Differences were observed between the results obtained for the two injectant species. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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