The impact of a plasma generation on the supersonic flow through a body called a “blunt cone-cylinder” is investigated experimentally and via computational fluid dynamics (CFD) in this chapter. A sequence of Schlieren images of the non-stationary interaction between the bow shock wave and blast wave are obtained using high speed shadowgraphy. The Euler equation system serves as the foundation for the calculations that follow. The freestream has a Mach number of 3.1. A bounded gas volume with increased pressure undergoes an immediate energy explosion to depict the plasmoid. It has been investigated how a bow shock wave and blast flow interact to generate a shock wave structure. The enormous energy released to a supersonic flow (500J) enabled the production of a schematic illustrating the origin and dynamics of the succeeding shock waves and contact discontinuities, as well as a significant reduction in drag force and stagnation pressure (close to 80%). A low density and high gas temperature zone, which is the main element lowering frontal body drag force, was also studied in terms of its dynamics. For various plasmoid energy values, the dynamics of the front surface drag forces have been examined. The computational and experimental flow patterns were found to be qualitatively in agreement.

Author(s) Details:

Irina Znamenskaya,
Lomonosov Moscow State University, 119234, Leninskie Gory 1, Build 2, Moscow, Russia.

Vladimir Chernikov,
Lomonosov Moscow State University, 119234, Leninskie Gory 1, Build 2, Moscow, Russia.

Olga Azarova,
Federal Research Center, “Computer Science and Control” of the Russian Academy of Sciences, 119333, Vavilova Street 44, Moscow, Russia.

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Keywords: Supersonic flow, bow shock wave, plasmoid, blast shock wave, shock-wave structure, drag force reduction

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