Gasdynamic phenomena accompanying the motion of shock waves and objects in a low-temperature nonequilibrium plasma

Bedin, Andrea

doi:10.1134/1.1261960

Cited by 2 publications

(3 citation statements)

References 2 publications

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“…Additionally, organizing MHD interaction at such scales potentially does not require the creation of high magnetic field values. Under the conditions considered, it can be expected: (a) a very intense MHD interaction (MHD interaction parameter estimation S m ≈ 1-50) with a significant reduction in the influence of the Hall effect; (b) the possibility of a noticeable influence of the self-induced magnetic field generated by currents in the plasma (Reynolds magnetic number estimation Re m ≈ (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15). The magnetohydrodynamic (MHD) interaction parameter (Stewart parameter)…”

Section: Magnetoplasmic Control In High-speed Gas and Plasma Flowsmentioning

confidence: 99%

“…The attractiveness of MagnetoPlasma Aerodynamics (MPA) is associated with the reliability and absence of control elements in the gas-plasma flow, the flexibility of controlling the spatio-temporal impact, the smallness of the inertia of the impact [2][3][4][5][6][7][8][9][10][11][12][13], the weight and energy consumption, the geometric dimensions of the plasma actuators, as well as the possibility of changing the plasma-dynamic characteristics of the flow using electric and magnetic fields, broadband radiation and external thermal effects. At the same time, the relatively low power consumption of plasma actuators makes it possible to create fundamentally new systems for controlling the trajectory of Advanced Aircraft (AA).…”

Section: Introductionmentioning

confidence: 99%

“…There is a need to explore new methods of controlling the motion of advanced aircraft and high-speed gas and plasma flows under the conditions considered here. Consequently, there is a need for the review, which analyses experimental and mathematical modelling [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15], currently playing an enormous part in the development of AA:…”

Section: Introductionmentioning

confidence: 99%

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Computational and Experimental Modeling in Magnetoplasma Aerodynamics and High-Speed Gas and Plasma Flows (A Review)

2023

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This paper provides an overview of modern research on magnetoplasma methods of influencing gas-dynamic and plasma flows. The main physical mechanisms that control the interaction of plasma discharges with gaseous moving media are indicated. The ways of organizing pulsed energy input, characteristic of plasma aerodynamics, are briefly described: linearly stabilized discharge, magnetoplasma compressor, capillary discharge, laser-microwave action, electron beam action, nanosecond surface barrier discharges, pulsed spark discharges, and nanosecond optical discharges. A description of the physical mechanism of heating the gas-plasma flow at high values of electric fields, which are realized in high-current and nanosecond (ultrafast heating) electric discharges, is performed. Methods for magnetoplasma control of the configuration and gas-dynamic characteristics of shock waves arising in front of promising and advanced aircraft (AA) are described. Approaches to the control of quasi-stationary separated flows, laminar–turbulent transitions, and static and dynamic separation of the boundary layer (for large PA angles of attack) are presented.

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Section: Magnetoplasmic Control In High-speed Gas and Plasma Flowsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Computational and Experimental Modeling in Magnetoplasma Aerodynamics and High-Speed Gas and Plasma Flows (A Review)

2023

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Theory and simulation of shock waves freely propagating through monoatomic non-Boltzmann gas

Döntgen

2024

Theor. Comput. Fluid Dyn.

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The effect of non-Boltzmann energy distributions on the free propagation of shock waves through a monoatomic gas is investigated via theory and simulation. First, the non-Boltzmann heat capacity ratio $$\gamma $$ γ , as a key property for describing shock waves, is derived from first principles via microcanonical integration. Second, atomistic molecular dynamics simulations resembling a shock tube setup are used to test the theory. The presented theory provides heat capacity ratios ranging from the well-known $$\gamma = 5/3$$ γ = 5 / 3 for Boltzmann energy-distributed gas to $$\gamma \rightarrow 1$$ γ → 1 for delta energy-distributed gas. The molecular dynamics simulations of Boltzmann and non-Boltzmann driven gases suggest that the shock wave propagates about 9% slower through the non-Boltzmann driven gas, while the contact wave appears to be about 4% faster if it trails non-Boltzmann driven gas. The observed slowdown of the shock wave through applying a non-Boltzmann energy distribution was found to be consistent with the classical shock wave equations when applying the non-Boltzmann heat capacity ratio. These fundamental findings provide insights into the behavior of non-Boltzmann gases and might help to improve the understanding of gas dynamical phenomena. Graphical abstract

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Gasdynamic phenomena accompanying the motion of shock waves and objects in a low-temperature nonequilibrium plasma

Abstract: An analysis is made of gasdynamic anomalies observed during the motion of shock waves and objects in a low-temperature nonequilibrium plasma. It is shown that these anomalies are associated with behavior of sound propagating in a nonequilibrium plasma.

Cited by 2 publications

References 2 publications

Computational and Experimental Modeling in Magnetoplasma Aerodynamics and High-Speed Gas and Plasma Flows (A Review)

Computational and Experimental Modeling in Magnetoplasma Aerodynamics and High-Speed Gas and Plasma Flows (A Review)

Theory and simulation of shock waves freely propagating through monoatomic non-Boltzmann gas

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