In this study, a method for controlling high-speed flows
using a continuously acting thermally stratified energy deposition is
presented. The study analyses the dependence of the shape and position of a bow
shock wave, drag and lift forces, and self-sustained flow pulsations on the
temperature values in the layers of a stratified energy source acting on an
aerodynamic body. Numerical modelling is based on the system of the
Navier-Stokes equations for viscous heat-conducting gas (air) at freestream
Mach number M∞=2. A detailed visualisation of the dynamics of the density,
pressure, temperature, and local Mach number fields during the controlled
establishment of steady-state flow regimes is presented. Multiple manifestation
of the Richtmyer–Meshkov instability is demonstrated. Sharp peaks accompanying
the development of Richtmyer–Meshkov instabilities are observed. These peaks
persist even in the steady-state flow regime established under the action of
stratified energy supply, changing the shape of the bow shock wave and giving
it a wavy form. Basic approaches to controlling the shape and position of the
bow shock wave, drag, and lift (pitch) forces (at zero angle of attack), as
well as stability in steady-state supersonic flow past an aerodynamic body, have
been developed using a continuously operating thermally stratified energy
deposition. The possibility of generating and damping self-sustaining flow
pulsations, as well as the formation of a steady flow with opposing,
continuously acting lift forces, is demonstrated by changing the temperature in
the layers of the thermally stratified energy source. The practical application
of the developed methods for control of the characteristics and stability of
high-speed flow/flight can be associated with the development of non-mechanical
control systems for aircraft at the stage of echelon (horizontal) flight.
Author(s) Details
O. A. Azarova
Federal Research Center “Computer Science and Control” of the Russian
Academy of Sciences, Vavilova Str. 44, Moscow 119333, Russia.
Please see the book here :- https://doi.org/10.9734/bpi/psniad/v3/6675
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