Thermal methods of drag control for cylindrical bodies with porous inserts in a supersonic flow

Results of experimental and numerical investigations of a supersonic flow of cylindrical models aligned at a zero angle of attack with frontal inserts made of cellular-porous nickel are reported. The experiments are performed in a supersonic wind tunnel at Mach numbers $\mathrm{M}= 4.85$ and $7.00$ and unit Reynolds numbers $\mathrm{Re}_1 = 2.7 \cdot 10^6$ and $1.5\cdot 10^6$ m$^{-1}$, respectively. Numerical simulations with the use of a ring-shaped skeleton model of the porous material are also performed. A possibility of drag control is studied for two thermal methods: external heating of the porous insert and internal heating of the insert by a glow discharge. The mechanisms of the thermal action and the efficiency of the thermal methods of drag control are analyzed.