Numerical Study of Magnetohydrodynamic Flow Control Along Superorbital Reentry Trajectories

摘要

Effects of magnetohydrodynamic flow control on the aerodynamic heating of a superorbital reentry body are examined by magnetohydrodynamic numerical simulation coupled with flight trajectory analysis. The initial flight altitude and velocity are set to 75km and 12.4km/s, respectively. Convective wall heat flux is directly calculated in the magnetohydrodynamic numerical simulation, whereas radiative wall heat flux is calculated by a structured package for the radiation analysis using the output data from the magnetohydrodynamic numerical simulation in an uncoupled manner of flowfield and radiation. Numerical results demonstrate that magnetohydrodynamic flow control significantly mitigates a peak value of total wall heat flux during the flight duration due to a drag-enhancement effect of magnetohydrodynamic flow control, although the total wall heat flux at high altitudes is elevated by magnetohydrodynamic flow control because of a considerable increase in radiative wall heat flux.