Pulse gas injection into the separation zone of hypersonic MHD flow over a rotation body

E. Gubanov - A. Likhachev - S. Medin

RAN Joint Institute for High Temperatures, 13 Izhorskaya str., bl. 2, Moscow 125412, Russia

Abstract
In our previous works [1, 2], we have modeled the hypersonic MHD flow over rotation bodies with an imbedded magnetic dipole. The simulations were conducted in the framework of a complete MHD model considering viscosity, thermal conductivity, induced magnetic field, and real air thermodynamic properties. It has been shown that the MHD interaction can lead to the formation of extensive separation zones with a practically motionless medium. The gas dynamic streamlines bypass the separation zone close to magnetic force lines. The position and dimensions of the separation zone at the body surface depend on and are controlled by the direction and value of the dipole magnetic moment. It has been found that the surface heat flux inside this zone is markedly reduced. It is of interest to consider the possibilities of additional heat protection of the body surface by a cold gas pulse injection into the separation zone, which seems quite stable with regard to external impacts. This issue is considered in the present paper. The study is conducted using the same physical model as in [1, 2]. Figs 8, Refs 7.