Study on Unsteady Triple-Shock Configurations in Supersonic Flows Past Combined Cylinder AD Bodies in Different Gas Media | Chapter 09 | New Approaches in Engineering Research Vol. 12

 The regulation of supersonic flows past aerodynamic bodies under the influence of external energy deposition is the subject of this research. The mechanism of a bow shock's interaction with an oblique shock coming from the bow shock's refraction at the external energy source surface is revealed. In this process, many types of shock waves may collide, including triple-shock configurations. The analysis of unsteady triple-shock configurations near the surface of combined cylinder bodies "hemisphere-cylinder" and "hemisphere-cone-cylinder" under the operation of external energy deposition and their effect on the body surface pressure are the goals of this paper. The calculations were carried out numerically using an inviscid technique based on the Euler equations at M=4 for gaseous mediums with specific heat ratios of 1.4 and 1.2. In the simulations, complex conservative difference techniques are applied. The angles of triple-shock arrangement have been shown to be dependent on the rarefaction degree in an energy source and the incidence shock angle. With rising boundary pressure, the generation of local space-time areas has been established. 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 in the mechanism of boundary pressure rise and local front drag force increase. A comparison with the symmetry of plane flow has also been made. The findings can be used to plan flow control using external energy deposition 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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