Structure of High-Speed Full-Cone Sprays

  • F. V. Bracco


A better understanding and characterization of the formation and propagation of high-velocity sprays from single-hole cylindrical nozzles is of importance both fundamentally and practically. The steady and transient structure of these sprays is qualitatively similar to that of incompressible jets but the breakup of the liquid column into drops and the presence of drops introduce substantial quantitative differences. Measurements of the angle of the spray and of the size of the drops near the nozzle suggest that the breakup of the outer surface of the liquid jet is due to aerodynamic forces that lead to the rapid and selective growth of surface perturbations generated within the nozzle. The state and mechanism of disruption of the inner part of the liquid jet is less clear but sufficiently downstream only individual drops are present. Recent LDV drop velocity measurements and detailed multidimensional computations have shown that at distances of the order of hundreds of nozzle diameters so much ambient gas has been entrained by the spray that the subsequent structure of the jet is dominated by the entrained ambient gas and the fully developed incompressible jet structure and drop-gas equilibrium are approached.


Nozzle Exit Nozzle Diameter Injection Velocity Spray Angle Centerline Velocity 
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  1. 1.
    E. Giffen and A. Muraszew, The Atomization of Liquid Fuels, John Wiley and Sons, New York (1953).Google Scholar
  2. 2.
    W. R. Marshal, Jr., Atomization and Spray Drying, AIChE Monogr. Ser. 50 (2)(1954).Google Scholar
  3. 3.
    N. Dombrowski and G. Mundy, Spray Drying, Biochemical and Biological Engineering Science, 22, Academic Press, New York (1968).Google Scholar
  4. 4.
    H. Schlichting, Boundary-Layer Theory, McGraw-Hill Book Co., New York (1968).Google Scholar
  5. 5.
    J. O. Hinze, Turbulence, McGraw-Hill Book Co., New York (1975).Google Scholar
  6. 6.
    G. N. Abramovich, The Theory of Turbulent Jets, The MIT Press, Cambridge, Massachusetts (1963).Google Scholar
  7. 7.
    W. Rizk, Experimental studies of the mixing processes and flow configurations in two-cycle engine scavening, Proc. Inst. Mech. Eng. 172, 417–437 (1958).CrossRefGoogle Scholar
  8. 8.
    R. D. Reitz and F. V. Bracco, Ultra-high-speed filming of atomizing jets, Phys. Fluids 22, 1054–1064 (1979).CrossRefGoogle Scholar
  9. 9.
    V. G. Levich, Physicochemical Hydrodynamics, Prentice-Hall, Englewood Cliffs, New Jersey (1962).Google Scholar
  10. 10.
    R. E. Phinney, The breakup of a turbulent liquid jet in a gaseous atmosphere, J. Fluid Mech. 60, 689–701 (1973).CrossRefGoogle Scholar
  11. 11.
    R. D. Reitz and F. V. Bracco, Mechanism of atomization of a liquid jet, Phys. Fluids 25, 1730–1742 (1982).MATHCrossRefGoogle Scholar
  12. 12.
    M. W. Thring and M. P. Newby, Combustion length of enclosed turbulent jet flames, in: Fourth Symp. (Int.) on Combust., pp. 789–796, Williams and Wilkins Co., Baltimore, Maryland (1953).Google Scholar
  13. 13.
    G. Kleinstein, Mixing in turbulent axially symmetric free jets, J. Spacecraft 1, 403–408 (1964).CrossRefGoogle Scholar
  14. 14.
    G. M. Faeth, Evaporation and combustion of sprays, Prog. Energy Combust. Sci. 9, 1–76 (1983).CrossRefGoogle Scholar
  15. 15.
    K.-J. Wu, A. Coghe, D. A. Santavicca, and F. V. Bracco, LDV measurements of drop velocity in Diesel-type sprays, AIAA J. (to appear).Google Scholar
  16. 16.
    I. Wygnanski and H. Fiedler, Some measurements in the self preserving jet, J. Fluid Mech. 38, 577–612 (1969).CrossRefGoogle Scholar
  17. 17.
    S. Corrsin and M. S. Uberoi, Further Experiments on the Flow and Heat Transfer in a Heated Turbulent Air Jet, NACA TR998 (1950).Google Scholar
  18. 18.
    S. P. Capp and W. K. George, Jr., Measurements in an axisymmetric jet using a two-color LDA and burst process, paper presented at Int. Symp. on Appl. of LDA to Fluid Mech., Lisbon, Portugal (1982).Google Scholar
  19. 19.
    H. Hiroyasu, M. Shimizu, and M. Arai, The breakup of high speed jet in a high pressure gaseous atmosphere, ICLASS-82, Madison, Wisconsin (1982).Google Scholar
  20. 20.
    K.-J. Wu, C.-C. Su, R. L. Steinberger, D. A. Santavicca, and F. V. Bracco, Measurements of the spray angle of atomizing jets, J. Fluids Eng. 105, 406–413 (1983).CrossRefGoogle Scholar
  21. 21.
    R. A. Castleman, Jr., The Mechanism of Atomization Accompanying Solid Injection, NACA Report No. 440 (1932).Google Scholar
  22. 22.
    W. E. Ranz, Some experiments on orifice sprays, Can. J. Chem. Eng. 36, 175–181 (1958).CrossRefGoogle Scholar
  23. 23.
    G. K. Batchelor (ed.), Collected Works of G. I. Taylor, Cambridge University Press, Cambridge, Mass. (1958).Google Scholar
  24. 24.
    R. D. Reitz, Atomization and Other Breakup Regimes of a Liquid Jet, Ph.D. Thesis No. 1375, Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey (1978).Google Scholar
  25. 25.
    R. D. Reitz and F. V. Bracco, On the Dependence of the Spray Angle and Other Spray Parameters on Nozzle Design and Operating Conditions, SAE Paper No. 790494 (1979).Google Scholar
  26. 26.
    K.-J. Wu, Atomizing Round Jets, Ph.D. Thesis No. 1612, Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey (1983).Google Scholar
  27. 27.
    K.-J. Wu, R. D. Reitz, and F. V. Bracco, Drop Sizes of Atomizing Jets (to appear).Google Scholar
  28. 28.
    N. Hay and P. L. Jones, Comparison of the Various Correlations for Spray Penetration, SAE Paper No. 720776 (1972).Google Scholar
  29. 29.
    S. Abramovich and A. Solan, The initial development of a submerged laminar round jet, J. Fluid Mech. 59, 791–801 (1973).CrossRefGoogle Scholar
  30. 30.
    T.-W. Kuo and F. V. Bracco, On the Scaling of Transient Laminar, Turbulent, and Spray Jets, SAE Paper No. 820038 (1982).Google Scholar
  31. 31.
    P. O. Witze, The Impulsively Started Incompressible Turbulent Jet, SANDIA 80-8617 (1980).Google Scholar
  32. 32.
    F. A. Williams, Combustion Theory, Addison-Wesley Publ. Co., Reading, Massachusetts (1965).Google Scholar
  33. 33.
    F. V. Bracco, Introducing a new generation of more detailed and informative combustion models, SAE Trans. 84, 3317–3340 (1975).Google Scholar
  34. 34.
    P. J. O’Rourke and F. V. Bracco, Modelling of drop interactions in thick sprays and a comparison with experiments, I Mech E Conference Publications 1980–9, 101-116 (1980).Google Scholar
  35. 35.
    L. Martinelli, R. D. Reitz, and F. V. Bracco, Comparisons of computed and measured dense spray jets, paper presented at 9th Int. Coll. on Dynamics of Explosions and Reactive Systems, Poitiers, France (1983). Proc. to appear in AIAA Progr. Astronaut. Aeronaut. Ser. Google Scholar
  36. 36.
    S. E. Elghobashi and T. W. Abou-Arab, A two-equation turbulence model for two-phase flows, Phys. Fluids 26, 931–938 (1983).MATHCrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1985

Authors and Affiliations

  • F. V. Bracco
    • 1
  1. 1.Department of Mechanical and Aerospace EngineeringPrinceton UniversityPrincetonUSA

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