Effect of Condensation on the Length of Strongly Underexpanded Jets Exhausting Into a Rarefied Submerged Space

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Abstract

Exhaustion of supersonic argon and nitrogen jets through sonic and supersonic nozzles into a rarefied submerged space at high stagnation pressures is studied experimentally. The shapes and lengths of the jets are visualized by means of detecting radiation excited in the considered flow by an electron beam. Dependences of the geometric parameters of the jets on exhaustion and clusterization conditions at low Reynolds numbers based on the reference length of the jet are obtained. It is found that the coefficient of proportionality between the length of the first “barrel” of the supersonic jet and the degree of jet expansion increases with an increase in the stagnation pressure. Empirical dependences of the proportionality coefficient on the size of clusters formed in supersonic flows are derived for the first time.

Keywords

supersonic jet clusterization electron beam visualization 

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References

  1. 1.
    Yu. I. Gerasimov and V. N. Yarygin, “Exhaustion of Ideal and Real Gas Jets from Axisymmetric Nozzles. Problem of Similarity. 2. Exhaustion into a Submerged Space,” Fiz.-Khim. Kinet. Gaz. Din. 13 (2) (2012); http://chemphys.edu.ru/issues/2012-13-2/articles/315/.Google Scholar
  2. 2.
    V. M. Aniskin, S. G. Mironov, and A. A. Maslov, “Relaminarization in Supersonic Microjets at Low Reynolds Numbers,” Pis’ma Zh. Tekh. Fiz. 39 (16), 47–54 (2013).Google Scholar
  3. 3.
    N. G. Korobeishchikov and O. I. Penkov, “Simple Method to Gas Cluster Size Determination Based onMolecular Beam Cross-Section,” Vacuum 125 (3), 205–208 (2016).ADSCrossRefGoogle Scholar
  4. 4.
    V. Zh. Madirbaev, A. E. Zarvin, and N. G. Korobeishchikov, “The Phenomenon of Ionic-Cluster Excitation of Argon Levels in Molecular Gas Mixtures,” in Advances in Nonequilibrium Processes: Plasma, Combustion, and Atmosphere, Ed. by A. M. Starik and S. M. Frolov (Torus Press, Moscow, 2014), pp. 76–82 [in Russian].Google Scholar
  5. 5.
    D. J. Carlson and C. H. Lewis, “Normal Shock Location in Underexpanded Gas and Gas-Particle Jets,” AIAA J. 2 (4), 776–777 (1964).ADSCrossRefGoogle Scholar
  6. 6.
    N. I. Kislyakov, A. K. Rebrov, and R. G. Sharafutdinov, “Structure of High-Pressure Low-Density Jets behind a Supersonic Nozzle,” Prikl. Mekh. Tekh. Fiz. 16 (2), 42–52 (1975) [J. Appl. Mech. Tech. Phys. 16 (2), 187–195 (1975)].Google Scholar
  7. 7.
    H. Pauly, Atom, Molecule and Cluster Beams. 1. Basic Theory, Production and Detection of Thermal Energy Beams (Springer-Verlag, Berlin–Heidelberg, 2000).Google Scholar
  8. 8.
    A. E. Zarvin, V. V. Kalyada, A. S. Yaskin, et al., “Experimental Setup for Plasmochemical Research,” Prib. Tekh. Eksp., No. 6, 50–56 (2016).Google Scholar
  9. 9.
    A. E. Zarvin, A. S. Yaskin, V. V. Kalyada, and B. S. Ezdin, “On the Structure of a Supersonic Jet under Conditions of Intense Condensation,” Pis’ma Zh. Tekh. Fiz. 41 (22), 74–81 (2015).Google Scholar
  10. 10.
    O. F. Hagena, “Cluster Ion Sources,” Rev. Sci. Instrum. 63, 2374–2379 (1992).ADSCrossRefGoogle Scholar
  11. 11.
    N. G. Korobeishchikov, P. A. Skovorodko, V. V. Kalyada, et al., “Experimental and Numerical Study of High Intensity Argon Cluster Beams,” AIP Conf. Proc. 1628, 885–892 (2014).ADSCrossRefGoogle Scholar

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© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  1. 1.Novosibirsk State UniversityNovosibirskRussia

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