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Transient processes in vibrationally excited diatomic gas with downwards flux of quanta

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Abstract

The kinetic cooling and formation of absolute inversion are studied numerically for the cases of a jump in the translational temperature of a vibrationally excited gas and instantaneous admixing of unexcited gas.

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Abbreviations

T1 :

vibrational temperature of the first vibrational level of the CO molecule

E1 :

energy of this level

T:

translational temperature of the gas

ΔE:

anharmonicity of the CO molecule

M:

Mach number

P2, ρ2, P1, ρ1 :

pressure and density of the gas behind the front of the shock wave and in front of the shock wave

γ :

adiabatic index

ECO, ΔEVV, ΔEVT :

vibrational energy stored in the CO molecules and the total energy effects of the VV-exchange and VT-re-laxation processes [J/cm3]

WVV and WVT :

total rates at which energy is released in VV exchange and VT relaxation processes [W/cm3]

Literature cited

  1. 1.

    B. F. Gordiets, A. I. Osipov, and L. A. Shelepin, Kinetic Processes in Lasers and Molecular Lasers [in Russian], Moscow (1980).

  2. 2.

    S. A. Zhdanok, A. P. Napartovich, and A. N. Starostin, Zh. Éksp. Teor. Fiz.,76, No. 1, 130–139 (1979).

  3. 3.

    A. V. Dem'yanov et al., Zh. Prikl. Mekh. Tekh. Fiz., No. 3, 5–10 (1981).

  4. 4.

    S. A. Losev and V. N. Makarov, Kvantovaya Élektron.,12, No. 8, 1628–1631 (1985).

  5. 5.

    A. A. Ionin et al., “Investigation of the lasing characteristics of an electroionization CO laser based on nitrogen-containing mixtures,” Preprint No. 232, Quantum Radiophysics, Physics Institute of the Academy of Sciences of the USSR, Moscow (1982).

  6. 6.

    L. D. Landau and E. M. Lifshits, Hydrodynamics [in Russian], Moscow (1986).

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Additional information

Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 55, No. 4, pp. 624–629, October, 1988.

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Kochetov, I.V., Kurnosov, A.K. & Napartovich, A.P. Transient processes in vibrationally excited diatomic gas with downwards flux of quanta. Journal of Engineering Physics 55, 1150–1153 (1988). https://doi.org/10.1007/BF01155225

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Keywords

  • Statistical Physic
  • Transient Process
  • Translational Temperature
  • Downward Flux
  • Kinetic Cool