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Journal of Applied Mechanics and Technical Physics

2021 year, number 2

Thermal Methods of Drag Control for Cylindrical Bodies with Porous Inserts in a Supersonic Flow

S. G. Mironov1,2, S. V. Kirilovskiy1,2, T. V. Poplavskaya1,2, I. S. Tsyryulnikov1,2
1Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
2Novosibirsk State University, Novosibirsk, 630090 Russia
Keywords: supersonic flows, flow control, porous gas-dynamic inserts, drag

Abstract

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 M¥= 4.85 and 7.00 and unit Reynolds numbers Re1 = 2.7 x 106 and 1.5 x 106 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.