抄録
We have carried out numerical simulations of MHD heat shield at several flight altitudes in a region of 48 to 72 km along the real reentry flight trajectory of OREX for examining the influence of induced magnetic field on the MHD heat shield. Thermochemical nonequilibrium effects, the Hall effect, and induced magnetic field have been taken into account in the numerical simulations. Numerical results show that the influence of induced magnetic field on the MHD heat shield can be neglected over the whole flight altitude region covered in the present study, although the magnetic Reynolds number estimated by the conventional manner in the study field of MHD heat shield is larger than unity at the altitudes above 60 km. We, therefore, declare that the magnetic Reynolds number estimated by the conventional manner cannot be used as the index parameter for assessing the necessity to consider the induced magnetic field under the situation of MHD heat shield.
