| Autor: |
Postnikov, Boris, Lomanovich, Konstantin |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 7/25/2019, Vol. 2125 Issue 1, p030011-1-030011-4, 4p, 2 Diagrams |
| Abstrakt: |
There are two main mechanisms of self-oscillations of shock waves in impact jets: the first is due to the occurrence of internal eddy currents in the stagnant zone (underexpanded jets), the second is the presence of external acoustic feedback (overexpanded jets). To influence the mechanisms of development of self-oscillations, methods of magnetoplasma aerodynamics were used – an electric discharge initiated near the nozzle edge. Along with stationary burning arc discharge, the effect on the flow of an arc discharge rotating in a magnetic field has been studied. Nonstationary supersonic flow regimes (M=1.0–3.25) with overexpanded and underexpanded jets (n=0.9–40.0), impermeable and porous (Π=0.95) obstacles were studied. A new method of magnetoplasma action by an electric discharge, burning both stationary and rotating in a magnetic field (B=0.02 T in the discharge region), on self-oscillations of the shock-wave structure of impact jets was proposed and first implemented. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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