Triple-shock Configurations, Complex Vortices, and Instabilities in High-speed Flows of Gaseous Media Containing External Energy Sources | Chapter 4 | Physical Science: New Insights and Developments Vol. 3

Supersonic flow control using energy deposition in different places in the flow and on an AD body’s surface has been widely researched in modern aerospace engineering. A key area of interest is the control of triple-shock configurations and vortex structures, which significantly affect the aerodynamic and thermal loads on bodies in high-speed flows. In this chapter, the problem of supersonic streamlining AD body, “a plate blunted by a cylinder” by a flow with the freestream Mach number M=4 containing an external energy source, was numerically studied, taking into account physical-chemical transformations. The results of the effect of the specific heat ratio \(\gamma\) changing in the range from 1.1 to 1.4 on the dynamics of triple-shock configurations and vortex-contact structures are presented for the interaction of an energy source with the bow shock wave. The energy source is modelled via the heated rarefied layer (filament). The angles in triple-shock configurations, the stagnation pressure, and the drag force were investigated as functions of the specific adiabat ratio γ, the characteristics of the energy source, and the incident shock angle. Vortex-contact structures were researched for the Mach numbers 7, 8, and 9. Generation of the Richtmyer-Meshkov instability accompanying the formation of a triple-shock configuration was obtained. The results showed a strong influence of the specific heat ratio of the gas medium and the parameters of the energy source on the triple-shock configuration and aerodynamic characteristics of the body. The obtained results may be of interest for aerospace applications in the field of designing nozzles, air intakes and high-speed aircraft, as well as designing control systems for flights in the atmospheres of other planets using external energy supply.

 

 

Author(s) Details

O. A. Azarova
Federal Research Center “Computer Science and Control” of RAS, Moscow, Russia.

 

L. G. Gvozdeva
Joint Institute for High Temperatures RAS, Moscow, Russia.

 

Please see the link:- https://doi.org/10.9734/bpi/psniad/v3/6567