Supersonic plasmatron nozzle profiling with the real properties of high temperature working gas

Gadzhiev, M. Kh.; Kulikov, Yu. M.; Panov, V. А.; Сон, Э. Е.; Tyuftyaev, A. S.

doi:10.1134/s0018151x15060073

Cited by 10 publications

(3 citation statements)

References 11 publications

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“…Оценки показали, что при токе 250 A значения температуры и концентрации электронов в приосевой плазме аргона на срезе сопла составляли T e = 12 kK, n e = 10 17 cm −3 , а на расстоянии 20 mm от среза T e = 10.5 kK, n e = 10 16 cm −3 . Скорость плазменного потока определялась по зна-чениям полного давления с помощью трубки Пито, представлявшей собой изогнутую капиллярную трубку, заключенную в медный корпус, охлаждаемый проточной водой [21]. Скорости плазменной струи на расстоянии 0−20 mm от среза сопла при токе 250 A и расходе газа 3 g/s составляли 1000−450 m/s соответственно.…”

Section: поступило в редакцию 27 января 2017 гunclassified

Влияние высокоэнтальпийного потока плазмы аргона на структуру и свойства нанокерамики YBa-=SUB=-2-=/SUB=-Cu-=SUB=-3-=/SUB=-O-=SUB=-7-delta-=/SUB=-

Gadzhiev¹,

Гаджимагомедов²,

Demirov³

et al. 2017

Письма В Журнал Технической Физики

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Приведены результаты исследований структуры и электросопротивления наноструктурированной керамики на основе YBa2Cu3O7-delta до и после воздействия высокоэнтальпийным потоком плазмы аргона. Показана возможность упрочнения межзеренных связей в приповерхностном слое этой керамики и изменения индекса кислородной стехиометрии в результате обработки плазменной струей. DOI: 10.21883/PJTF.2017.13.44808.16719

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Section: поступило в редакцию 27 января 2017 гunclassified

Влияние высокоэнтальпийного потока плазмы аргона на структуру и свойства нанокерамики YBa-=SUB=-2-=/SUB=-Cu-=SUB=-3-=/SUB=-O-=SUB=-7-delta-=/SUB=-

Gadzhiev¹,

Гаджимагомедов²,

Demirov³

et al. 2017

Письма В Журнал Технической Физики

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“…This process is important in the upper atmosphere, where atomic oxygen represents the second major species after molecular nitrogen, and thus plays a key role in the energy transfer process (e.g., in the high-temperature shock wave near the surface of spacecraft or hypersonic aircraft). [25][26][27] In this paper we present a rigorous study of the same molecular system, N 2 + O( 3 P), using two alternative theoretical tools, that may offer some improvement over the previous work. Namely, we carried out accurate quantum calculations of cross section oscillations using the time-independent coupledchannel (CC) method which, if numerically converged and combined with an accurate potential energy surface (or surfaces and surface couplings, in a nonadiabatic process), 5 is usually considered to offer a nearly exact treatment of the process.…”

Section: Introductionmentioning

confidence: 99%

Description of quantum interference using mixed quantum/classical theory of inelastic scattering

Bostan

Mandal

Joy

et al. 2023

Phys. Chem. Chem. Phys.

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“…with idle current of i 0 = 4 mA and a linear dependence of the pressure drop from the current dP/di = 1.2927 × 10 8 Pa/A. The current is measured by a digital microammeter with a precision of δi = 1 µA [12]. Measurements have shown that in nitrogen and air plasma, depending on the initial conditions; at a distance of 0-30 mm from the nozzle of the plasma torch the near axis speed changes in the range of 1000-300 m/s.…”

mentioning

confidence: 99%

Generator of chemically active low-temperature plasma

Tyuftyaev

Gadzhiev

Sargsyan

et al. 2016

J. Phys.: Conf. Ser.

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Abstract.A new generator of high enthalpy (H0 > 40 kJ/g), chemically active nitrogen and air plasmas was designed and constructed. Main feature of the generator is an expanding channel of an output electrode; the generator belongs to the class of DC plasma torches with thermionic cathode with an efficiency of 80%. The generator ensures the formation of a slightly divergent plasma jet (2α = 12• ) with a diameter of D = 10-12 mm, an electric arc maximum power of 20-50 kW, plasma forming gas flow rate 1.0-2.0 g/s, and the average plasma temperature at an outlet of 8000-11000 K.Generator of low-temperature plasma (GLP) has attracted the attention of specialists in the field of gas discharge physics and low-temperature plasma, and in the field of high-temperature gas dynamics by the fact that in the discharge gap of GLP the temperature range varies from thousands to tens of thousands degrees. This provides great opportunities for research in the thermal, electrical and optical properties of gases, as well as for the research in various plasmachemical reactions [1][2][3][4].To do these researches it is necessary to have a reliable GLP, in the discharge gap of which high-enthalpy plasma stream of chemically reactive gases (nitrogen, air) is created.As such plasma source a GLP with vortex stabilization and divergent channel of an output electrode was used, which provides high flow performance and long service life of the plasma torch as well as efficient heating of the working environment and small thermal losses in the water-cooled parts of the device [5,6]. Typically, the GLP with a longitudinal gas flow are constructed with a cylindrical channel of constant cross section. The electrical discharge, features of a high-temperature gas flow, and parameters of the plasma generator with such channel are well known [7,8]. The plasma torch with a constant cross-section channel has several flaws: falling current-voltage characteristic (CVC), unsustainable modes of operation, low thermal efficiency. That is why in order to achieve the desired average plasma temperature at the outlet a lot of input power is required, which in turn affects the lifespan, energy efficiency and stability of the plasma torch. In addition, stricter requirements for the supply of electric power are required to stabilize the arc. In such generators to stabilize the arc and its insulation from the walls of the channel porous injection, axial flow or twist of gas are used [4,8], as well as various cavities, ledges, diaphragms, interelectrode segments are implemented [9], which complicate their design.Equipping plasma torch with gas track with divergent channel of an output electrode enables the arc burning in a laminar stream at high velocity of gas at the inlet [5,6]. Another important

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Supersonic plasmatron nozzle profiling with the real properties of high temperature working gas

Cited by 10 publications

References 11 publications

Влияние высокоэнтальпийного потока плазмы аргона на структуру и свойства нанокерамики YBa-=SUB=-2-=/SUB=-Cu-=SUB=-3-=/SUB=-O-=SUB=-7-delta-=/SUB=-

Влияние высокоэнтальпийного потока плазмы аргона на структуру и свойства нанокерамики YBa-=SUB=-2-=/SUB=-Cu-=SUB=-3-=/SUB=-O-=SUB=-7-delta-=/SUB=-

Description of quantum interference using mixed quantum/classical theory of inelastic scattering

Generator of chemically active low-temperature plasma

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