Hall effect in flight magnetogasdynamics.

Abstract

The purpose of this paper is to consider the influence of the Hall effect on magnetogasdynamic flow around the nose of a blunt body. In the present analysis local similarity is applied to the stagnation region of the attached shock layer generated in the hypersonic flow about a blunt body containing a magnetic dipole source. Both electrically conducting and insulated bodies are considered. The Hall effect causes the fluid to acquire a component of current at right angles to the electric field relative to the fluid. In the case of axisymmetric flow, currents arise in the meridian planes as well as reduced currents in the azimuthal direction. The former interact with the magnetic field and produce an azimuthal Lorentz body force that induces flow in the azimuthal direction and produces a reactive torque on the magnetic source. In general the magnetogasdynamic effect is to increase the shock standoff distance and the total drag experienced by the body. However, when Hall effects are considered, these changes are less pronounced. Further, the conducting body is found to have a greater shock standoff, drag, and rolling-moment coefficient than the insulated body.