Fine Structure of MW Discharge: Evolution Scenario

Kolesnichenko, Yuri; Brovkin, Vadim; Khmara, Dmitri; Lashkov, V. A.; Mashek, I. Ch.; Rivkin, Mark Ilyich

doi:10.2514/6.2003-362

Cited by 9 publications

(8 citation statements)

References 1 publication

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“…That is why many experiments on drag reduction control by plasma were performed with thin filaments generation [Azarova et al, 2011]. As examples we will mention the pulsed laser energy deposition ], MW filaments generation [Kolesnichenko et al, 2004], counter-flow jet injection [Shang, 2002]. Papers [Adelgren et al, , 2002 examined the effect of pulsed energy deposition on the flow past a sphere at M 1 = 3-4.5.…”

Section: Wwwintechopencommentioning

confidence: 99%

“…Paper [Kolesnichenko et al, 2004] presented the results of controlling the bow shock wave structure with a thin plasma layer formation by applying microwave discharge. The filament, which is formed in 1-2 ns and has a radial dimension of less than 3 × 10 −3 cm, has a specific energy of approximately 7 eV per particle with a peak n e ≈ 5 × 10 16 cm −3 .…”

Section: Wwwintechopencommentioning

confidence: 99%

“…right -luminosity distribution fields. 60 and 85 s after the MW discharge [Kolesnichenko et al, 2004].…”

Section: Wwwintechopencommentioning

confidence: 99%

“…In [Kolesnichenko et al, 2004] it was shown that the energy efficiency of the stagnation pressure reduction is directly proportional to (D/d) ratio, where D and d are the model and discharge filament diameter, respectively. The validity of this scaling relationship was proved for model diameters between 8 and 30 mm.…”

Section: Wwwintechopencommentioning

confidence: 99%

See 3 more Smart Citations

Nonequilibrium Plasma Aerodynamics

Starikovskiy¹,

Aleksandrov²

2011

Aeronautics and Astronautics

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Section: Wwwintechopencommentioning

confidence: 99%

Section: Wwwintechopencommentioning

confidence: 99%

“…right -luminosity distribution fields. 60 and 85 s after the MW discharge [Kolesnichenko et al, 2004].…”

Section: Wwwintechopencommentioning

confidence: 99%

Section: Wwwintechopencommentioning

confidence: 99%

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Nonequilibrium Plasma Aerodynamics

Starikovskiy¹,

Aleksandrov²

2011

Aeronautics and Astronautics

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“…6. The rotational relaxation factor is given by (26) where is dimensionless, E=N j r is in Townsend, and d i are specified constants. The expression is shown in Fig.…”

Section: Reduced Field and Other Parametersmentioning

confidence: 99%

Interaction of Microwave-Generated Plasma with a Hemisphere Cylinder at Mach 2.1

Knight

Kolesnichenko²,

Brovkin³

et al. 2009

AIAA Journal

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Microwave energy deposition is a novel method for flow control in high-speed flows. Experiments have demonstrated its capability for beneficial flowfield modification in supersonic flow including, for example, drag reduction for blunt bodies. A fully three-dimensional, time-accurate gas dynamic code has been developed for simulating microwave energy deposition in air and the interaction of the microwave-generated plasma with the supersonic flow past a blunt body. The thermochemistry model includes 23 species and 238 reactions. The code is applied to the simulation of microwave energy deposition in supersonic flow past a hemisphere cylinder. The computed centerline surface pressure is compared with the experiment. The interaction of the microwave-generated plasma with the flowfield structure is examined. Nomenclature c p i = specific heat at constant pressure for species i D = diameter of cylinder E, E o = electric field, maximum electric field H = total enthalpy per unit mass of mixture h o f i = heat of formation of species i at temperature T ref h i = static enthalpy of species i per unit mass of species i h = static enthalpy per unit mass of mixture K k = reaction coefficient for reaction k k = Boltzmann constant, 1:38 10 23 J=K k E = microwave wave number, 2= M = representative mass for ions and neutrals M i = molecular weight of species i, kg=kg mol M i = species i (e.g., M 1 e) M 1 = Mach number m = number of reactions m e = mass of electron N = total concentration of species excluding electrons, cm 3 N e , N crit e = electron concentration, critical electron concentration, cm 3 N i = concentration of species i, cm 3 n = number of species including electrons p = static pressure _ p i k = rate of production of species i from reaction k Fig. 1 Interaction of microwave-generated plasma with cylinder. Fig. 2 Centerline pressure vs time. _ q = rate of heating of gas per unit volume R = universal gas constant, 8314 J=kg mol K T = static (translational) temperature of mixture T e = electron temperature u i = mass-averaged velocity component in i direction V dr = drift velocity x i = Cartesian coordinate Y i = mass fraction of species i, Y i i = i = fraction of h i converted into heating of gas h i = rate of change in enthalpy due to reaction i = 2m e =M " = total energy per unit mass of mixture = wavelength of microwave = rotational relaxation factor, dimensionless e = effective frequency of electron collisions 0 ik , 00 ik

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Experimental Study of Air Breakdown Induced by Subcritical Streamer Microwave Discharge

Булат

Esakov

Grachev

et al. 2021

IEEE Trans. Plasma Sci.

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Streamers are non-thermal filamentary plasmas developing in insulating mediums under the influence of strong external electric field. The subcritical streamer discharge is formed by a field with the intensity smaller than the minimum intensity leading to the air breakdown, and breakdown conditions are created by special initiators. Air breakdown in sub-and supersonic flows induced by the subcritical streamer discharge and the effect of the initiator shape on breakdown conditions are studied. The intensity of electric field of subcritical streamer induced breakdown has been shown to be smaller compared to that initiated by microwave discharge without initiator. The dependencies of critical intensity of the electric field on the pressure and location of initiator are reported. The air breakdown conditions are found at various dimensions of the metallic screen near which the initiator is installed.

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Fine Structure of MW Discharge: Evolution Scenario

Cited by 9 publications

References 1 publication

Nonequilibrium Plasma Aerodynamics

Nonequilibrium Plasma Aerodynamics

Interaction of Microwave-Generated Plasma with a Hemisphere Cylinder at Mach 2.1

Experimental Study of Air Breakdown Induced by Subcritical Streamer Microwave Discharge

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