Study of vibrational deactivation of molecules of carbon dioxide gas during cooling of stream in a supersonic nozzle

  • N. V. Evtyukhin
  • S. A. Losev
  • V. N. Makarov
  • V. A. Pavlov
  • M. S. Yalovik


The vibrational temperature of the antisymmetrical type of vibrations (v3) of the CO2 molecule at the exit of a supersonic nozzle is measured in the present work using the method of recording the infrared emission. Freezing in of thev3-type vibrations was observed during the flow of undiluted carbon dioxide in a nozzle. In this case the vibrational temperature T3 considerably exceeded the translational temperature. On the basis of a comparison of the experimental results with calculation it can be concluded that vibrational deactivation of CO2 molecules occurs three to five times faster than the excitation of the vibrations during heating in a shock wave. All the experiments were conducted under the following conditions: maximum expansion of gas in nozzle A/A* = 115, temperature range 1900–2400 °K, pressure range 1–17.5 atm.


Dioxide Mathematical Modeling Carbon Dioxide Shock Wave Mechanical Engineer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literature cited

  1. 1.
    C. W. Von Rosenberg, R. L. Taylor, and J. D. Teare, “Vibrational relaxation of CO in nonequilibrium nozzle flow and the effect of hydrogen atoms on CO relaxation,” J. Chem. Phys.,54, No. 5 (1971).Google Scholar
  2. 2.
    J. R. MacDonald, “Interpretation of sodium line-reversal measurements in rapid expansions of nitrogen,” J. Chem. Phys.,57, No. 2 (1972).Google Scholar
  3. 3.
    I. R. Hurle, A. L. Russo, and J. G. Hall, “Spectroscopic studies of vibrational nonequilibrium in supersonic nozzle flows,” J. Chem. Phys.,40, No. 8 (1964).Google Scholar
  4. 4.
    S. A. Losev, O. P. Shatalov, and M. S. Yalovik, “Effect of anharmonicity on relaxation time during adiabatic excitation and deactivation of molecule vibrations,” Dokl. Akad. Nauk SSSR,195, No. 3 (1970).Google Scholar
  5. 5.
    J. P. Hodgson, “The nonequilibrium emissivity of carbon dioxide near 4.3 μ,” Aeronaut. Res. Counc. Current Paper, No. 1116, H. M. Stat. Off., London (1970).Google Scholar
  6. 6.
    N. G. Basov, V. G. Mikhailov, A. N. Oraevskii, and V. A. Shcheglov, “Production of population inversion of molecules in a supersonic stream of binary gas in a Laval nozzle,” Zh. Tekh. Fiz.,38, No. 12 (1968).Google Scholar
  7. 7.
    A. S. Biryukov and B. F. Gordiets, “Kinetic equations of relaxation of vibrational energy in a mixture of polyatomic gases,” Zh. Prikl. Mekhan. i Tekh. Fiz., No. 6 (1972).Google Scholar
  8. 8.
    N. A. Generalov, G. I. Kozlov, and I. K. Selezneva, “Population inversion of CO2 molecules in expanding gas streams,” Zh. Prikl. Mekhan. i Tekh. Fiz., No. 5, (1971).Google Scholar
  9. 9.
    R. L. Taylor and S. Bitterman, “Survey of vibrational relaxation data for processes important in the CO2-N2 laser system,” Rev. Mod. Phys.,41, No. 1 (1969).Google Scholar
  10. 10.
    W. A. Rosser, A. D. Wood, and E. T. Gerry, “Deactivation of vibrationally excited carbon dioxide (v 3) by collisions with carbon dioxide or with nitrogen,” J. Chem. Phys.,50, No. 11 (1969).Google Scholar
  11. 11.
    J. C. Stephenson and C. B. Moore, “Near-resonant vibration-vibration energy transfer: CO2(v 3 = 1) + M CO2(v 1 = 1) + M +ΔE,” J. Chem. Phys.,52, 2333 (1970).Google Scholar
  12. 12.
    W. A. Rosser and E. T. Gerry, “De-excitation of vibrationally excited CO2 (001) by collisions with CO2, H2, NO, and C12,” J. Chem. Phys.,54, No. 9 (1971).Google Scholar
  13. 13.
    A. S. Biryukov, V. K. Konyukhov, A. I. Lukovnikov, and R. I. Serikov, “Relaxation of vibrational energy of 00 °1 level of carbon dioxide molecule,” Preprint Fiz. In-ta Akad. Nauk SSSR, No. 9 (1973).Google Scholar
  14. 14.
    A. F. Burke and K. D. Bird, “Use of conical and profiled nozzles in hypersonic instruments,” in: Current Technology of Aerodynamic Studies at Hypersonic Velocities [in Russian], Mashinostroenie, Moscow (1965).Google Scholar
  15. 15.
    C. E. Smith, “The starting process in a hypersonic nozzle,” J. Fluid Mech.,24, Part 4 (1966).Google Scholar

Copyright information

© Plenum Publishing Corporation 1975

Authors and Affiliations

  • N. V. Evtyukhin
    • 1
  • S. A. Losev
    • 1
  • V. N. Makarov
    • 1
  • V. A. Pavlov
    • 1
  • M. S. Yalovik
    • 1
  1. 1.Moscow

Personalised recommendations