This paper describes the results of an experimental investigation on the effect of the MHD interaction with the plasma of the shock layer above a test body immersed into a hypersonic argon flow. The hypersonic flow is obtained from the high-enthalpy arc-heated wind tunnel of Alta-CPR (Pisa) at Mach 6. Test at heating chamber stagnation pressures of 0.65, 0.85, and 1 bar, and magnetic fields in the range of 0.15-0.35 T, are carried out. The experimental observations are done by means of a set of electrical probes, an optical multi-channel analyser, and a fast shutter CCD camera. In order to maximize the effect of the MHD interaction the Faraday field is shorted ad a magnetic field perpendicular to the test body surface is used. Due to the MHD interaction increases of the distance between the shock front and the body surface are observed. The MHD interaction effect is reduced by the low conductivity of the plasma in the boundary layer above the test body surface.
Experimental Investigation on the Magneto-Hydrodynamic Interaction in the Shock Layer on a Hypersonic Body
BORGHI, CARLO ANGELO;CARRARO, MARIO ROBERTO;CRISTOFOLINI, ANDREA;
2004
Abstract
This paper describes the results of an experimental investigation on the effect of the MHD interaction with the plasma of the shock layer above a test body immersed into a hypersonic argon flow. The hypersonic flow is obtained from the high-enthalpy arc-heated wind tunnel of Alta-CPR (Pisa) at Mach 6. Test at heating chamber stagnation pressures of 0.65, 0.85, and 1 bar, and magnetic fields in the range of 0.15-0.35 T, are carried out. The experimental observations are done by means of a set of electrical probes, an optical multi-channel analyser, and a fast shutter CCD camera. In order to maximize the effect of the MHD interaction the Faraday field is shorted ad a magnetic field perpendicular to the test body surface is used. Due to the MHD interaction increases of the distance between the shock front and the body surface are observed. The MHD interaction effect is reduced by the low conductivity of the plasma in the boundary layer above the test body surface.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
