Study on Unsteady Triple-Shock Configurations in Supersonic Flows Past Combined Cylinder AD Bodies in Different Gas Media | Chapter 9 | New Approaches in Engineering Research Vol. 12

The regulation of supersonic flows past aerodynamic bodies under the influence of external energy deposition is the focus of this research. The interplay of a bow shock over a body with the oblique shock caused by the bow shock's refraction at the external energy source surface is revealed. Triple-shock configurations, for example, are one sort of shock wave intersection that could occur during this operation. The analysis of unsteady triple-shock configurations near the surface of combined cylinder bodies "hemisphere-cylinder" and "hemisphere-cone-cylinder" under the action of external energy deposition, as well as their effect on the body surface pressure, are the goals of this article. The calculations were carried out numerically using an inviscid approach based on the Euler equations at M=4 for gaseous media with 1.4 and 1.2 ratios of specific heats. The simulations employ sophisticated conservative difference techniques. The angles of a triple-shock arrangement have been shown to be dependent on the degree of rarefaction in an energy source as well as the incidence shock angle. With increased boundary pressure, local space-time areas can be generated. The activity of a vortex as well as the action of the originating shock segments in the region of a triple-shock configuration are shown to be linked to the mechanism of boundary pressure rise and local front drag force increase. A comparison with the symmetry of the plane flow has also been made. The findings can be utilised to plan flow control using external energy deposition techniques such as laser, microwave, or electrical discharge.

Author (S) Details

Olga Azarova
Department of Mathematical Modeling of Computer-Aided Design Systems, Federal Research Center “Computer Science and Control” of the Russian Academy of Sciences, Vavilova st. 40, 119333, Moscow, Russia.

Ludmila Gvozdeva
Department of Physical Gas Dynamics, Joint Institute for High Temperatures of the Russian Academy of Sciences Izhorskaya str. 13/2, 125412, Moscow, Russia.

Oleg Kravchenko
Department of Mathematical Modeling of Computer-Aided Design Systems, Federal Research Center “Computer Science and Control” of the Russian Academy of Sciences, Vavilova st. 40, 119333, Moscow, Russia.

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