| Autor: |
Lysenko, Vladimir I., Smorodsky, Boris V., Ermolaev, Yuri G., Kosinov, Alexander D. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 7/25/2019, Vol. 2125 Issue 1, p030106-1-030106-4, 4p, 1 Diagram, 1 Graph |
| Abstrakt: |
The experimental investigation of the influence of the distributed heavy gas (sulfur hexafluoride of SF6) injection (into the wall layer of a boundary layer) on the hydrodynamic stability in relation to artificial (controlled) disturbances of the supersonic flat-plate boundary layer at free-stream Mach number M=2 have been performed. Controlled disturbances have been introduced into the boundary layer past the model by means of a harmonic point glow discharge disturbance generator. At different speeds of injection of sulfur hexafluoride, β-spectra (mean-square disturbance amplitudes depending on a longitudinal wave number β) measured at exciting frequency f=14 kHz, were defined and compared. It is shown (and for the first time experimentally for controlled disturbances) that such heavy-gas (sulfur-hexafluoride) injection leads to the boundary-layer stabilization, at least, at an exciting frequency. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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