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Structure of High-Speed Full-Cone Sprays

  • F. V. Bracco

Abstract

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.

Keywords

Nozzle Exit Nozzle Diameter Injection Velocity Spray Angle Centerline Velocity 
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.

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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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