Particle Dispersion in Turbulent Sprays

Abstract

Measurements of droplet dispersion and vaporization rates are carried out and compared with computational predictions. Droplet dispersion, mean axial velocity and the axial autocorrelation function of the droplets are measured using a laser sheet technique. The experimental facility is modified to accommodate a true spray using an ultrasonic atomizer and droplets injected with a fluorescent dye. The computational part of the project is the development of a Large Eddy Simulation method for the turbulent jet. A LES-model for the unresolved scales of the flow is implemented into the Navier-Stokes solver. The results for filtered and unfiltered variables are compared to the experiments and improvement of the particle statistics due to the LES-model is found. Turbulence, Sprays, Particle dispersion.

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Document Details

Document Type
Technical Report
Publication Date
Apr 20, 1993
Accession Number
ADA271314

Entities

People

  • Ian M. Kennedy
  • Wolfgang Kollmann

Organizations

  • University of California

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Alkanes
  • Angular Momentum
  • Combustion
  • Computational Fluid Dynamics
  • Computational Science
  • Equations
  • Flow
  • Fluid Dynamics
  • Fluid Flow
  • Large Eddy Simulation
  • Measurement
  • Navier Stokes Equations
  • Reynolds Number
  • Shear Flow
  • Simulations
  • Statistics
  • Turbulent Flow

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Computational Fluid Dynamics (CFD)
  • Internal Combustion Engine (ICE) Technology.

Technology Areas

  • Directed Energy