科研之友
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摘要
The generator performance and the aerodynamic heating of a reentry body equipped with an onboard-surface Hall-type magnetohydrodynamic power generator are examined under some different anode electrode configuration cases by means of two-dimensional numerical simulation. The reentry body with a nose radius of 1.35 m has a pair of electrodes on the wall surface. Flight altitude and velocity are set to 60 km and 5.6 km/s, respectively. The strength of an applied magnetic field is about 0.5 T. Numerical results demonstrate that the onboard-surface Hall-type magnetohydrodynamic power generator can effectively mitigate the wall heat flux at the stagnation point as well as extract the electrical power exceeding 1 MW when a ring-shaped anode electrode is placed on the wall surface away from the stagnation point. On the other hand, if a bowl-shaped anode electrode is placed to cover a wide wall surface including the stagnation point, an effective mitigation of the wall heat flux at the stagnation point by the magnetohydrodynamic interaction becomes impossible, although the electrical power exceeding 1 MW can be obtained. This is because a Hall electric field, strong enough to induce the strong magnetohydrodynamic interaction, cannot be obtained near the stagnation point, due to the electrically coupled circuit between the plasma and the bowl-shaped anode electrode.
- 出版日期2010-8
