Skip to main content
SpringerLink
Log in

Water vapor cooling when radiation of wavelength λ=2.8 μm is absorbed

  • Published:
Fluid Dynamics Aims and scope Submit manuscript

Abstract

Investigations of the processes arising under the influence of electromagnetic radiation on resonantly absorbing gaseous media have now been widely developed. Particular interest is shown in the penetration of a pulse of laser radiation through the atmosphere. The main component absorbing the radiation of both CO2 and HF lasers (wavelengths, respectively, 10.6 and 2.8 μm) in the earth's atmosphere is water vapor [1]. Numerous experimental investigations show that the integrated coefficient of laser radiation absorption by water vapor is fairly large [1–3], while at the same time the energy absorption leads to the heating of the medium in a channel around the beam and, as a consequence, to its defocusing. However, all these investigations were carried out with continuous sources of laser radiation or with pulses of fairly great duration. It will be shown below that gas cooling in the channel around the beam is possible when a pulse of radiation with wavelength λ 2.8 μm whose duration is less than the vibrational-translational (V-T) relaxation time of the energy absorbed by the H2O molecules passes through a stationary medium containing water vapor.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

Literature cited

  1. V. E. Zuev, Propagation of Visible and Infrared Radiation in the Atmosphere, Halsted Press, New York (1974).

    Google Scholar 

  2. L. Bertrand, J. P. Monchalin, and R. Corriveau, “Photoacoustic measurement of water vapor and CO2 absorption coefficients at HF-laser wavelengths,” Appl. Opt.,22, 3148 (1983).

    Google Scholar 

  3. R. J. Nordstrom, M. E. Thomas, J. C. Peterson, E. K. Damon, and R. K. Long, “Effects of oxygen addition on pressure-broadened water-vapor absorption in 10 μm region,” Appl. Opt.,17, 2724 (1978).

    Google Scholar 

  4. P. E. Fraley and K. N. Rao, “High resolution infrared spectra vapor ν1 and ν3 bands of H2 16O,” J. Mol. Spectros.,29, 348 (1969).

    Google Scholar 

  5. J. M. Flaud and C. Camy-Peyret, 'The interacting states (020), (100), and (001) of H2 16O,” J. Mol. Spectros.,51, 142 (1974).

    Google Scholar 

  6. Chemical Lasers [Russian translation], Kir, Moscow (1974).

  7. V. A. Levin and A. M. Starik, “Vibrational energy transfer in H2O-H2-O2 mixtures in the case of rapid cooling in supersonic nozzles,” Izv. Akad. Nauk SSSR, Mekh. Zhidk. Gaza, No. 2, 101 (1982).

    Google Scholar 

  8. V. A. Levin and A. M. Starik, “Some methods of obtaining an inverted population using vibrational levels of a H2O molecule,” in: Nonequilibrium Gas Flows with Physicochemical Conversions [in Russian], Izd. MGU, Moscov; (1980), pp. 4–25.

    Google Scholar 

  9. J. Fnzi, P. E. Hoviz, V. N. Panfilov, P. Hess, and C. B. Moore, “Vibrational relaxation of water vapor,” J. Chem. Phys.,67, No. 9, 4053 (1977).

    Google Scholar 

  10. H. E. Bass, R. G. Keeton, and D. Williams, “Vibrational and rotational relaxation in mixtures of water vapor and oxygen,” J. Acoust. Soc. Am.,60, 74 (1976).

    Google Scholar 

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

    Google Scholar 

  12. A. B. Britan and A. M. Starik, “Investigation of vibrational-nonequilibrium flow of a CO2-N2-O2-H2O mixture in a wedge-shaped nozzle.” Zh. Prikl. Mekh. Tekh. Fiz., No. 4, 41 (1980).

    Google Scholar 

  13. A. M. Starik, “Cooling: of a flow of diatomic molecule gas by resonance radiation,” Zh. Prikl. Mekh. Tekh. Fiz., No. 5, 3 (1984).

    Google Scholar 

  14. S. A. Losev, Gas-Dynamical Lasers [in Russian], Nauka, Moscow (1977).

    Google Scholar 

  15. V. S. Matveev, “Approximate representations of the absorption coefficient and equivalent widths of lines with Voigt contours,” Zh. Prikl. Spektrosk.,16, 223 (1972).

    Google Scholar 

  16. J.-M. Flaud, C. Camy-Peyret, and R. A. Toth, “Water vapor line parameters from microwave to infrared medium,” Tables of Constants and Numerical Data, Pergamon Press, Oxford (1981).

    Google Scholar 

  17. A. M. Starik, “Kinetic cooling of moving gas,” Izv. Akad. Nauk SSSR, Mekh. Zhidk. Gaza, No. 3, 127 (1932).

    Google Scholar 

  18. J.-Y. Mandin, C. Camy-Peyret, J.-M. Flaud, and G. Guelachvili, “Measurements and calculations of self-broadening coefficients of lines belonging to the 2ν2, ν1, and ν3 bands of H2 16O,” Can. J. Phys.,60, 94 (1982).

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Moscow

    V. A. Levin, A. A. Sorokin & A. M. Starik

Authors
  1. V. A. Levin
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. A. A. Sorokin
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. A. M. Starik
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 3, pp. 141–151, May–June, 1986.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Levin, V.A., Sorokin, A.A. & Starik, A.M. Water vapor cooling when radiation of wavelength λ=2.8 μm is absorbed. Fluid Dyn 21, 456–465 (1986). https://doi.org/10.1007/BF01409734

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01409734

Keywords

Search

Navigation